I charge the tablet like 3hrs ago, around 5 and 6pm, and its still in 40% ang then suddenly it drops to 39% (still plugged in and charging).
Im just surfing the web and some facebook, most of the time surfing the web. And i keep on killing task (manual kill).
Is my battery already broken?
Sent from my SGP311 using xda app-developers app
while charging does the notification light glow ?
What do you use to charge?
Big screens need a lot of juice and XTZ is bigger than most.
A PC USB port supplies usually 0.5A, while Sony's charger is 2A... Both can be insufficient to charge the device while in use, but the wall charger might manage it if you only use WiFi + display...but not really sure.
For comparision some tablets even refuse to charge at all from weak sources, like phone charger or PC - the iPad.
Unfortunate Sony doesn't tell if the juice is enough.
I can see you used it most of the time you charged it and the WiFi - is it Facebook the app that's using it so much?
FYI car charger is weak as well usually - 1, 1.5 amps
Sent from my HTC One S using xda app-developers app
Rozamar said:
What do you use to charge?
Big screens need a lot of juice and XTZ is bigger than most.
A PC USB port supplies usually 0.5A, while Sony's charger is 2A... Both can be insufficient to charge the device while in use, but the wall charger might manage it if you only use WiFi + display...but not really sure.
For comparision some tablets even refuse to charge at all from weak sources, like phone charger or PC - the iPad.
Unfortunate Sony doesn't tell if the juice is enough.
I can see you used it most of the time you charged it and the WiFi - is it Facebook the app that's using it so much?
FYI car charger is weak as well usually - 1, 1.5 amps
Sent from my HTC One S using xda app-developers app
Click to expand...
Click to collapse
The Sony charger I have is 1.5 A (UK version). There were lot of comments about slow charging etc and about how a 2A charger charges the XTZ quicker. I installed an app from the play store called "Battery Monitor Widget". I used it to record just the current drawn. I used the Sony Charger and also another 2A charger at various times, the current drawn does not show any higher than 1.1 Amps with either one even while it is in use. So I don't know if the 2A charger really makes a difference. I only charged from 70% to 100% and back. I will check lower values a bit later and post results. However what I did notice was if I use a long cable (to test - longer than 1.5m), then the charging current drops. Use a short cable, or Sony's own cable, the current goes back up suggesting the XTZ port really monitor the charge port.. The Charging current almost always started off with 500 mA +, which is probably why the PC USB port could not charge it; I say probably because the PC I have is quite old and has only USB 2. Anyways, maybe installing the app and keep it running in the background may give you some indications of the charging current drawn..It actually creates a timestamped log file which you can analyse later as well..
In the tool there are options for calibrating the battery etc, but I have not used it, and I do not know how it works and if it works in XTZ. I just monitored the charging current.
I did a test by draining the battery to 26%. Then when I start charging, the charging current is shown as ~850 mA. This is with Wifi on, and screen brightness set to Auto.Then when I increase the screen brightness to max, guess what, the charging current is either 0 or shown as discharging, which means the battery won't charge. Brightness set to Auto or low, causes the charging current to go upto 850 and the % charge also increases. Given that the charger is capable of 1.5A and I have seen on occasion 1.1 A being recorded, I am not sure why it charges at constant ~850mA. Possibly due to differences in voltages. This is with Sony Charger (1.5A)
I tried it with a 2A charger, and when the screen brightness is set to max, the charging still takes place although at a very low 100mA. And normal charging shows a current of ~950mA. Which is probably why some people noticed faster charging with a 2A charger as opposed to the Sony supplied one.
In short, if you want to get the tablet to charge properly using Sony Charger, try keeping the screen brightness to low or screen off.
I must qualify the above by saying I am not an expert in chargers.. Just putting down something I noticed..
nitin_ko said:
while charging does the notification light glow ?
Click to expand...
Click to collapse
Yup its orange that time..
Rozamar said:
What do you use to charge?
Big screens need a lot of juice and XTZ is bigger than most.
A PC USB port supplies usually 0.5A, while Sony's charger is 2A... Both can be insufficient to charge the device while in use, but the wall charger might manage it if you only use WiFi + display...but not really sure.
For comparision some tablets even refuse to charge at all from weak sources, like phone charger or PC - the iPad.
Unfortunate Sony doesn't tell if the juice is enough.
I can see you used it most of the time you charged it and the WiFi - is it Facebook the app that's using it so much?
FYI car charger is weak as well usually - 1, 1.5 amps
Sent from my HTC One S using xda app-developers app
Click to expand...
Click to collapse
Well, i charge it with the one that came with the XTZ so its the normal charger.
Usually i charge it overnight before i sleep and turned off it just happened that i charged it early and screen is the one eating so much for about 55% next is android os and others are below 10%.
Actually im thinking before it happened i installed some games but as i said others are below 10% so im fine with it
Also im thinking about the current, because when i got my XTZ im in my aunts home and whether i charge it turned off or on it charges fast and when i got back on my apartment then charging becomes slow..
Sent from my SGP311 using xda app-developers app
For all charge you use simply the Sony cable (quite short idd) and their own cable?
I haven't monitored with the app, but I belive the 2a charger I used charges faster. Mind you I,ve never used the XTZ while charging, I spoke from expirience with other tablets.
PS: If you use the cradle you might want to check my other topic - I had issues XTZ refusing to charge when low batt and 2A charger...
Sent from my HTC One S using xda app-developers app
Charged mine for a while this morning in the Sony dock with power on, wifi on, screen off. Like others, I use an iPad charger (2.1A).
The battery went from 11% to 55% in about 2 hours, so about 22% per hour - though I think it slows down as the % gets higher.
Related
has anyone else noticed how quickly this phone charges? I just wanted to give some props to HTC.. I forgot to plug in the phone last night, and when I woke up this morning it was 0% dead. I plugged it in, and got ready for work, an hour later when I had to leave for work, it was at 96%!!
hell ya
Nice, haven't really paid much attention actually.
All I can say is that the ReZound is everything the my Thunderbolt should've been, including the battery charge and life.
Hmm.. I mainly just charge in my car & it seems like it takes forever(close to 3 hours). I spend most of my time driving otherwise i'd plug it into the wall and see. I guess it also doesn't help that the phone is also always being used while charging to.
However, battery life wise, it lasts 2 - 3 of constant use before it dies.
voxigenboy said:
Hmm.. I mainly just charge in my car & it seems like it takes forever(close to 3 hours). I spend most of my time driving otherwise i'd plug it into the wall and see. I guess it also doesn't help that the phone is also always being used while charging to.
However, battery life wise, it lasts 2 - 3 of constant use before it dies.
Click to expand...
Click to collapse
It will take longer to charge from a USB port and a car charger....won't take nearly as long when plugged into the wall. Just an fyi
Sent from my Inc HD
yeah, the motorola car charger or the htc one seem to be the best bet..you have to look at amps.
most ****ty car chargers are like 500ma, which will take like 3-4 hours to charge..you have to get the ones that match the AC charger, so around 1amp (1000ma) and you're set. the motorola is the closest i've seen, at like 950ma or so. charges it pretty well.
i have the motorola p513 rapid car charger & that's the one that seems to take forever. i've also got a 400watt power inverter & have tried just using the cable & wall plug that came with the phone and it doesn't seem to make much difference either. i've tried it in both the limo and my van... i know it's not a problem battery-wise with the van as there's 6 car batteries in it.
shazbot!...
I have the extended battery for mine, it seems to go from 10% to 100% in about four hours. I think for most phones it'd about three hours or so for a stock battery. So it looks like it does charge faster for me as well.
sent from my rezound that is waiting for permanent root
I ran my phone till it died today. I have had it on the charger for 1 1/2 hours, still barely 50%, I think you were on crack man. I was charging the phone with it off for the first hour too.
AtLemacks said:
I ran my phone till it died today. I have had it on the charger for 1 1/2 hours, still barely 50%, I think you were on crack man. I was charging the phone with it off for the first hour too.
Click to expand...
Click to collapse
i used to have this problem until i found there was a difference between charging cables and chargers. I dont mean the amperage size, i mean, some chargers/cables put your phone into USB charging mode, which is much much slower than AC charging.
THere is an app on the market called 'current widget' that can tell your charge rate. I used it on an older phone that was compatible with the widget (rooted rommed and cust kernel) and found that the charger I was using wasnt "AC" charging my phone, even though it was an AC charger. I went through a couple of cable charger combinations until i found the ones that worked right.
I have a USB car charger too (the kind you just plug a USB cable into). Using the widget i found that the USB cable I was using in my car was not 'AC' Charging the phone, and as a result, if i used navigation or anything like that, the phone would deplete power faster than it was getting it. I changed cables and problem was solved.
You can download the widget and use it on the rezound, but it does not update correctly, nor does it seem to be as accurate as it should.
For example, if I am not charging the phone, it should say "0 mA, but it does not. I have noticed though that when I am getting a good charge, the charging rate does show an increased rate, and because I am failure with the app, ive used it to confirm the charging rates.
You can try to download the app and run it. Plug in your phone, and look at the 'mA'. While its not charging it will be ~100 or so. during charging it should be up in the 500-600 range. but the app does not update as fast as it should, so you have to let it sit a bit before the number will change (normally it changes in realtime) but after charging for 5 min or so , if you still see numbers <200 you are not charging at the optimal rate. Try a new charger / cable.
I have 6 chargers, lol. All of them are 850mA chargers.
Here's a screenshot from this morning, I went to bed with at at 5%, and looks like it was full charged within 2 hours time. Not bad!
msticlaru said:
i used to have this problem until i found there was a difference between charging cables and chargers. I dont mean the amperage size, i mean, some chargers/cables put your phone into USB charging mode, which is much much slower than AC charging.
THere is an app on the market called 'current widget' that can tell your charge rate. I used it on an older phone that was compatible with the widget (rooted rommed and cust kernel) and found that the charger I was using wasnt "AC" charging my phone, even though it was an AC charger. I went through a couple of cable charger combinations until i found the ones that worked right.
I have a USB car charger too (the kind you just plug a USB cable into). Using the widget i found that the USB cable I was using in my car was not 'AC' Charging the phone, and as a result, if i used navigation or anything like that, the phone would deplete power faster than it was getting it. I changed cables and problem was solved.
You can download the widget and use it on the rezound, but it does not update correctly, nor does it seem to be as accurate as it should.
For example, if I am not charging the phone, it should say "0 mA, but it does not. I have noticed though that when I am getting a good charge, the charging rate does show an increased rate, and because I am failure with the app, ive used it to confirm the charging rates.
You can try to download the app and run it. Plug in your phone, and look at the 'mA'. While its not charging it will be ~100 or so. during charging it should be up in the 500-600 range. but the app does not update as fast as it should, so you have to let it sit a bit before the number will change (normally it changes in realtime) but after charging for 5 min or so , if you still see numbers <200 you are not charging at the optimal rate. Try a new charger / cable.
Click to expand...
Click to collapse
You know current widget shows how much your phone is using right? It never says 0mA when your phone is charging because your phone is using current when it is in use. It never goes to zero at any time actually unless your phone is dead.
Sent from my ADR6425LVW using xda premium
joshnichols189 said:
You know current widget shows how much your phone is using right? It never says 0mA when your phone is charging because your phone is using current when it is in use. It never goes to zero at any time actually unless your phone is dead.
Sent from my ADR6425LVW using xda premium
Click to expand...
Click to collapse
that is not the way it worked with the droid charge with a custom kernel. It showed your charging current. or more accurately, the amount of current that was going to the battery for charging. When the charger was unplugged, it showed 0mA.
Maybe we are talking about different apps
that is really fast. I wonder if that is why some of them are overheating and going into bootloops...
nrfitchett4 said:
that is really fast. I wonder if that is why some of them are overheating and going into bootloops...
Click to expand...
Click to collapse
Good point... They may not be regulating the rate they are charging properly.
Wait aren't our wall chargers one amp? Why's it showing around 600 ma?
Sent from my ADR6425LVW using XDA App
jayochs said:
Wait aren't our wall chargers one amp? Why's it showing around 600 ma?
Sent from my ADR6425LVW using XDA App
Click to expand...
Click to collapse
even with a 2amp wall charger I bought on amazon, my phones never get above about 600mah charge.
joshnichols189 said:
You know current widget shows how much your phone is using right? It never says 0mA when your phone is charging because your phone is using current when it is in use. It never goes to zero at any time actually unless your phone is dead.
Sent from my ADR6425LVW using xda premium
Click to expand...
Click to collapse
Hehe... That "Current Widget"... When I use my Belkin USB car charger dongle, it fluctuates between 100 - 300mA... When I use my Power Inverter, it's 400 - 900(depending if the engine I'd running or not.
The bizarre thing though, is when it's not even plugged in/charging, the widget still shows mA fluctuations and makes me wonder if the thing is even working or not.
Alright peeps, I just got this Belkin 2.1amp (2100mA) usb car dongle "rapid charger" from Walmart. The packaging says it's for tablets so I'll see how it holds up against the mighty Rezound.
unplugged my phone at 8 read xda forum for 5 mins got to work right now 943 already at 89 percent. Does this seem normal? I been checking better battery stats but don't really understand it. I feel like something is trying to sync. i have fetch off for email and Facebook. anyway to diagnose this on saurom rc4 clean boot.
Sent from my oversized communication device.
Are you overclocked? If you are, which governor are you using? I've posted in the OC kernel thread about an issue where the CPU is running at max frequency the entire time causing a huge battery drain.
I am right now but its showing me deep sleep and 192mhz on demond has a big percentage. Its not running max clocked i know that.
Sent from my oversized communication device.
This is my shots I'm at 78 percent now been on xda for maybe teen more mins. My brightness is one step above min level. Its like 1 percent every 3 mins when screen is on even if I'm idle.
Sent from my oversized communication device.
h3r3tic said:
This is my shots I'm at 78 percent now been on xda for maybe teen more mins. My brightness is one step above min level. Its like 1 percent every 3 mins when screen is on even if I'm idle.
Sent from my oversized communication device.
Click to expand...
Click to collapse
I think I know what the problem is: Your phone is trying to kill itself and save humanity from that terrible font
seems like a bit much but it could be normal.
Once your phone's charge reaches 100% it stops charging to prevent damage to the Lithium-ion battery. I am not sure however when it starts charging again.
Mine charge % dips even when I am using plugged in! Horrible consumption with screen on.
installed only few apps.
Sent from my SAMSUNG-SGH-I717 using XDA
mdamathew said:
Mine charge % dips even when I am using plugged in! Horrible consumption with screen on.
installed only few apps.
Click to expand...
Click to collapse
Are you using the Samsung OEM home charger? It shouldn't be dipping when using that one. Mine will charge AND increase while using it in the car with GPS running (huge battery drainer) and a driving DVR program (DailyRoads Voyager) and the screen on. All with a car charger and cheater plug that shorts Pin 2&3. That's the secret to getting rapid charge to work. The OEM home charger has those pins shorted internally. If you are trying to charge over USB on your computer then again you need that cheater plug and ensure the USB port can support more than 700 mA. If it's a USB 3.0 port then it should handle that current.
No problems for me on the stock or aftermarket chargers with the screen on.
I have the same problem with my brand new I717 GN. Battery level slowly drops when on charge, even if it's the OEM wall adapter. I've tried my Kindle USB cables as well with about the same results. I noticed the charge is a bit stronger from the wall source, but still can't keep up with even simple web browsing via WiFi. I've installed JuiceDefender as well, and it's helped reduce depletion a bit, but not really enough. This phone would never last me a full day of intermittent use without a power source.
I've read several of these threads and there doesn't really seem to be a solid solution to this other than some GN owners saying they have the problem and some don't...
Someone mentioned a crosswired 'Smart Adapter Compatible with Samsung Galaxy S' on Amazon (I'm too new and can't post the link)... I might try that but maybe I'll return for a new one if some people don't have this battery problem, unless it turns out to be a latest firmware problem..?
billzilla2000 said:
I have the same problem with my brand new I717 GN. Battery level slowly drops when on charge, even if it's the OEM wall adapter. I've tried my Kindle USB cables as well with about the same results. I noticed the charge is a bit stronger from the wall source, but still can't keep up with even simple web browsing via WiFi. I've installed JuiceDefender as well, and it's helped reduce depletion a bit, but not really enough. This phone would never last me a full day of intermittent use without a power source.
I've read several of these threads and there doesn't really seem to be a solid solution to this other than some GN owners saying they have the problem and some don't...
Someone mentioned a crosswired 'Smart Adapter Compatible with Samsung Galaxy S' on Amazon (I'm too new and can't post the link)... I might try that but maybe I'll return for a new one if some people don't have this battery problem, unless it turns out to be a latest firmware problem..?
Click to expand...
Click to collapse
he mentioned it and linked it 2 posts above you
ive thanked him, and guess about to buy
just that shipping cost more than the item itself, sheesh
I read an article in a journal recently about how smartphones charge their batteries. The article claimed that once the charge has reached 100%, it will stop providing current to the device until it reaches 90%, after which it will then trickle charge to maintain it at about 90%. All the while the battery meter will still show 100% (at least in the case of iPhones), but after you unplug the phone the first 10% will go rather quickly as it approaches the real charge level.
True for our notes? No idea. But with how Lithium batteries work, I wouldn't be surprised.
I haven't gotten my Note to discharge while plugged in with the OEM AC charger. In the car however, running Waze will suck the life out of it even while charging. (My car charger puts out about 150mA less than the OEM AC charger). Oddly enough, running Navigon on battery alone has less discharge than running Waze while plugged in...Which sucks, because while Waze has crappy directions, it has saved me many hours by routing around traffic. But at least the phone still charges while using Navigon and streaming some Pandora.
Did you guys notice the battery take too long for full charge? Especially charging while in use. It seems doesnt charge at all
Could anyone help me out? I was charging and surfing web the XTZ at the same time, but the battery even went down by 2 to 3% in 3 hours even though the tablet was charging. Is it common or should I exchange it?
Thanks
Is this with the charger and cable it came with? I am not having this problem but different chargers and cables can cause issues
Sent from my SGP312 using Tapatalk HD
Yea I had mine at 10%, put it in to charge. Come back home 6-7 hrs later and it's only at 44%?!?
The Jones said:
Is this with the charger and cable it came with? I am not having this problem but different chargers and cables can cause issues
Sent from my SGP312 using Tapatalk HD
Click to expand...
Click to collapse
Yes. I used the original charger and cable. When I let the screen on while charging, it seems like its just preventing the battery run down, instead of adding more charge. I guess I got a defective battery. When the screen off, it just take too long for full charge, like almost 9-10 hrs. I test the cable and charger with another device it seem working fine. How long it take for you to do full charge when screen of btw?
duy.la1811 said:
Yes. I used the original charger and cable. When I let the screen on while charging, it seems like its just preventing the battery run down, instead of adding more charge. I guess I got a defective battery. When the screen off, it just take too long for full charge, like almost 9-10 hrs. I test the cable and charger with another device it seem working fine. How long it take for you to do full charge when screen of btw?
Click to expand...
Click to collapse
I don't know exactly how long. But charging and using the device at the same time is no problem and adds charge at an ok rate. I would guess that a total charge would take around 4 hours but it is a guess.
Sent from my SGP312 using Tapatalk HD
ABT4 said:
Yea I had mine at 10%, put it in to charge. Come back home 6-7 hrs later and it's only at 44%?!?
Click to expand...
Click to collapse
Have you tried Stamina mode while charging? I believe it shuts down some background processing while the tablet is asleep. Might help speed up charging.
DaddyWhale said:
Have you tried Stamina mode while charging? I believe it shuts down some background processing while the tablet is asleep. Might help speed up charging.
Click to expand...
Click to collapse
I did some research and this is what I came up with...
-- the USB charging seems to be hard-limited to a maximum of 500mAh intake. This is consistent with the original USB specifications, although no one really adheres to those anymore anyways. Charging with 500mAh is bound to take a long time and presumable even light usage (screen-on + sufing) will prevent charging at all and still drain the battery or keep it at the same charge level. I consider this a quite major design fault and wonder why Sony did this - if they had any strong reasons (overheating near USB port due to the thin build and no heatsink properties of the material?) or if it can and will be adressed later on by software (I am not sure if that is the case...)
-- this also means that using different chargers (if they work at all, the Tablet seems to be picky and did not make use of two generic ones that were tried, only a HTC wallcharger was accepted next to the original Sony one) that put out more than those 500mAh will either not work or they will deliver just the 500mAh the USB port accepts as a maximum
-- however the charging cradle contacts will readily charge the tablet with up to 1500mAh
If one were to assume the worst of Sony one could say they probably limited the USB charging to a minimum to push the sales of their original chargers. On the other hand one can argue that SLOW charging is actually better for the battery longevity, so Sony could defend that move with that reasoning...
DaddyWhale said:
Have you tried Stamina mode while charging? I believe it shuts down some background processing while the tablet is asleep. Might help speed up charging.
Click to expand...
Click to collapse
I'd also believe this might help charging faster while not using the device. Could anyone try that, please? I'm interested in the results. (My XTZ hasn't arrived yet )
Shanliang- said:
I'd also believe this might help charging faster while not using the device. Could anyone try that, please? I'm interested in the results. (My XTZ hasn't arrived yet )
Click to expand...
Click to collapse
There is a thing that while playing "heavy" games and charging from usb connected to pc it even dicharges. If connect it to stock charger (1.5A) it manages to charge but very very slow. There are chargers for 3.1A or even 5A which will charge your device very quickly.
Rootk1t said:
There is a thing that while playing "heavy" games and charging from usb connected to pc it even dicharges. If connect it to stock charger (1.5A) it manages to charge but very very slow. There are chargers for 3.1A or even 5A which will charge your device very quickly.
Click to expand...
Click to collapse
Have you actually tried one of those with success? If so what is yout exact serial number for the XTZ ? As I laid out in my post a little bit above yours the XTZ seems to not take more than 500mAh via USB even from any charger...
Walter_White said:
I did some research and this is what I came up with...
-- the USB charging seems to be hard-limited to a maximum of 500mAh intake. This is consistent with the original USB specifications, although no one really adheres to those anymore anyways. Charging with 500mAh is bound to take a long time and presumable even light usage (screen-on + sufing) will prevent charging at all and still drain the battery or keep it at the same charge level. I consider this a quite major design fault and wonder why Sony did this - if they had any strong reasons (overheating near USB port due to the thin build and no heatsink properties of the material?) or if it can and will be adressed later on by software (I am not sure if that is the case...)
-- this also means that using different chargers (if they work at all, the Tablet seems to be picky and did not make use of two generic ones that were tried, only a HTC wallcharger was accepted next to the original Sony one) that put out more than those 500mAh will either not work or they will deliver just the 500mAh the USB port accepts as a maximum
-- however the charging cradle contacts will readily charge the tablet with up to 1500mAh
If one were to assume the worst of Sony one could say they probably limited the USB charging to a minimum to push the sales of their original chargers. On the other hand one can argue that SLOW charging is actually better for the battery longevity, so Sony could defend that move with that reasoning...
Click to expand...
Click to collapse
WTF...
i just did check the charger ... its 1500 mAh output. But it surely doesnt charge with that so clearly usb is limiting it Oo. So clearly dock is a must not only no flaping cover but also faster charge. Anyone with dock can confirm that ?
Trno said:
WTF...
i just did check the charger ... its 1500 mAh output. But it surely doesnt charge with that so clearly usb is limiting it Oo. So clearly dock is a must not only no flaping cover but also faster charge. Anyone with dock can confirm that ?
Click to expand...
Click to collapse
I guess this how they boost the sale of their dock and avoid overheating..limit the USB output. They also sell the micro USB and charger on sony website. Dont know if it could make any difference.
I had my tablet plugged into my pc and while I was using it the battery actually went up a 1 or 2 percent. I got mine two days ago so maybe it's an early production issue?
Sent from my SGP311 using xda premium
fahadbr said:
I had my tablet plugged into my pc and while I was using it the battery actually went up a 1 or 2 percent. I got mine two days ago so maybe it's an early production issue?
Sent from my SGP311 using xda premium
Click to expand...
Click to collapse
I noticed that if I set the brightness to the minimum, I would be able to charge while screen on. If I set to max or somewhere middle, i would not. did it happen to you? if not I think my battery got issue then.
I believe mine was on auto brightness for that moment. I did notice that in the last two days, full brightness drains the battery A LOT. Within 2 hrs of screen time I was down to 55% battery
Sent from my SAMSUNG-SGH-I317 using xda premium
Just got mine XTZ and so happy with it, but same thing it take so long for charge it even with the wallplug.
I just notice, i have the XZ and if i use the cable directly on the phone it take a long time for charge it too. But if u use the dock my phone charge in less than one hour ( or maybe a little bit more), So i can guess is a usb limitation on the sony product (or maybe a marketing trap)
Sorry for my English.
In my case, since i've the Galaxy S4 ATT version, i use that wall charger i've not tried the one that comes with the tablet but the S4 charger is a 2A while the Tablet Z is 1.5, with the S4 one + stamina mode + auto brightness + special mode(only 1 core running under clocked to 1036Mhz, conservative governor) my tablet charges ultra fast from 10% to 50% in 1 hour and half or even less, also my standby time is up to 8 days at full battery.
If you have your tablet rooted and you want to use my special mode, just download CPU Adjuster from Play Store, give it root permissions, then create a screen off profile, 1 core, max 1036Mhz and that's it.
Walter_White said:
I did some research and this is what I came up with...
-- the USB charging seems to be hard-limited to a maximum of 500mAh intake. This is consistent with the original USB specifications, although no one really adheres to those anymore anyways. Charging with 500mAh is bound to take a long time and presumable even light usage (screen-on + sufing) will prevent charging at all and still drain the battery or keep it at the same charge level. I consider this a quite major design fault and wonder why Sony did this - if they had any strong reasons (overheating near USB port due to the thin build and no heatsink properties of the material?) or if it can and will be adressed later on by software (I am not sure if that is the case...)
-- this also means that using different chargers (if they work at all, the Tablet seems to be picky and did not make use of two generic ones that were tried, only a HTC wallcharger was accepted next to the original Sony one) that put out more than those 500mAh will either not work or they will deliver just the 500mAh the USB port accepts as a maximum
-- however the charging cradle contacts will readily charge the tablet with up to 1500mAh
If one were to assume the worst of Sony one could say they probably limited the USB charging to a minimum to push the sales of their original chargers. On the other hand one can argue that SLOW charging is actually better for the battery longevity, so Sony could defend that move with that reasoning...
Click to expand...
Click to collapse
why should it be like that? We have a 6Amp battery in there and if it WOULD charge all the time with 500mAh max we would have a charging time of 12 hours. But if the battery reaches 80% charge charging will be much slower. That means if your statement would be true, we would have charging time of over 14-15 hours.
I charged mine in 6-7 hours. 6000/6=1000 so it´s normal for our 1,5 Amp charger.
Okay, tested it. Shorty story is, there is no difference between charging via dock and charging directly via USB port.
Long story:
- variation tested: SGP312 (WLAN 32GB)
- Battery percentage at start: 58%
- Charging time: 70 minutes
- Charger used - the one which came with the Tablet. The dock does not have a charger in either case, you have to use the Tablet one (which I do) or a 3rd party charger for it.
The only difference between the tests is that once the USB cable went directly into the Tablet and once the USB cable went into the dock.
Battery percentage after 70 Minutes with USB cable: 80%
Battery percentage after 70 Minutes with Dock: 81%
So basically, it got from 60 to 80% about ~1150mA / hour independently of the charging method.
As a sidenote, bringing it from 80% back to 58% took 28 minutes of playing a 1080p mkv at full display brightness,
I love my Mega. It is by far the best phone Ive ever had. But, the problems I have with the power usage and management on the device are a total nightmare.
1) The discharging nightmare:
The battery lasts NOTHING. Basically I get about 5 hours of use.. maximum.. no matter what I do.. and I have slimmed down to the ROM to having that NOTHING active.. I literally am left with active 6 services and I monitor CPU usage that is always near zero with NO apps hogging resources. From what I monitor on the device's battery usage, it's clearly always about 90% from the display! And yes, I dim the screen as much as I can of course, but usually not below 1/2way.. I hate screens too dim. However even just on standby with the screen off I still lose about 5% to 8% of battery an hour. Worse, even with the device Powered OFF, I still lose about 20% of battery a day. The ONLY way I have found out to control battery drain completely, is to take the battery out. That's it. Anyone else with similar symptoms and a fix or, is just that the stock battery totally sucks??? Also, any other off brand batteries are any better?.. (not the fat ones rated at much higher amps but that have an extra bulge.. that I don’t want)..
2) The charging nightmare:
This to me is the worse problem. It is bad enough how quickly this device issues battery, bit not nearly as bad as trying to charge efficiently again. I now have tried 3 different chargers/brands (and cables) to try fix the charging problem that is, it takes HOURS and HOURS to charge the battery. I am talking 5 to 6 hours to get it charged and if the screen is on and Im using the device it actually charges NOTHING at all and still keeps discharging (albeit much slower of course)... the fact is that the charging process is so pathetically slow that is less than real-time which means, with the device connected to power supply, the battery STILL drains if I try use it. This is absurd. However, mysteriously enough I have found ONE way that charges the phone super fast.. using a SONY External Power Pack (model CP-F1L) rated at 2200mAh. This is seems crazy because the power output of an external power pack should be much lower than the stock (and other Samsung) USB chargers.. but, it's what works.. the ONLY thing that works. And I have noticed that when connected to a USB Power charger, the Mega's Red LED light turn on faded.. however, when connected to the SONY External Power Pack, is bright red. Clearly more juice going in.. or something like that. Again, anyone else with similar symptoms and a fix the charging time, or, any good recommendation on a extra strong USB power adapter/charger that will make this thing at least charge faster?
Thanks in advance for the input and advice:silly:
Sounds like something is not letting your phone sleep or the battery is defective. Try putting CPU spy on it and let it set for a while. Then check to see if it is getting into deep sleep or if it is even stuck at a certain frequency.
There is an app on the playstore called Galaxy charging. Try it to see what rate it is charging. Though with the rate your phone discharges, the charger may only being supplying an amount just over the drain rate which is why it takes so long to charge.
Sent from my SAMSUNG-SM-N900A using XDA Premium 4 mobile app
Yes this is not normal, I get five hours screen time on fifteen hours usage.
Sent from my GT-I9205 using Tapatalk 2
Yep, something wrong there. I'm stock and this thing won't quit :good:
I would flash the stock rom back into your phone and see how the battery works then as this not normal as mentioned by other members as I am still on the stock rom but rooted only and I have great battery life.
That is were to start by flashing the stock rom and if no change then battery or maybe a hardware problem.
Did you have good battery life before you starting flashing with the phone or did this occur after the stock rom was removed and custom rom with stuff removed to gain performance?
Sent from my SGH-I527M using xda app-developers app
Sometime i got 96% bug
Battry is fully charged = 100%
remove charger
Reboot device
Suddenly Battery become = 96%
ps000000 said:
Sometime i got 96% bug
Battry is fully charged = 100%
remove charger
Reboot device
Suddenly Battery become = 96%
Click to expand...
Click to collapse
You could try to remove the battery from the phone for about 5 secs and re-install and see it that helps as sometimes if you take the charger off as soon as it is done charging it might not show 100% at times when booting as I leave mine on for a bit longer and it seems to help..even though charge light is green..I leave it longer on.
If your phone is rooted get a app called battery calibrator from the google store as it is free and install it and just before you shut down the phone to charge wipe the battery stats with this app and then shutdown phone and fully charge and then see how the battery works after the battery stats wipe as that can usually help.
Sent from my SGH-I527M using xda app-developers app
,,
,,
..
Mad383Max said:
Sounds like something is not letting your phone sleep or the battery is defective. Try putting CPU spy on it and let it set for a while. Then check to see if it is getting into deep sleep or if it is even stuck at a certain frequency.
There is an app on the playstore called Galaxy charging. Try it to see what rate it is charging. Though with the rate your phone discharges, the charger may only being supplying an amount just over the drain rate which is why it takes so long to charge.
Click to expand...
Click to collapse
Thanks for the tip. Installed the app you recommend, now I understand better. With the stock Samsung USB charger I get 420 readings. With the other 2 chargers I get 500 and 540. However, with the Sony External Power Pack I get 1900!..no wonder it charges super fast with it! My question now is what's up with all the USB chargers I have? I even tried my old Galaxy Tab 7 charger (strongest rated charger I have) and still only feeds 480. This is all so bizarre. So, where to get a super strong charger for the Mega?
(sorry.. by whatever reason my reply got posted 4 times.. so strange. I try delete the first three but cant)..
VeEuzUKY said:
Thanks for the tip. Installed the app you recommend, now I understand better. With the stock Samsung USB charger I get 420 readings. With the other 2 chargers I get 500 and 540. However, with the Sony External Power Pack I get 1900!..no wonder it charges super fast with it! My question now is what's up with all the USB chargers I have? I even tried my old Galaxy Tab 7 charger (strongest rated charger I have) and still only feeds 480. This is all so bizarre. So, where to get a super strong charger for the Mega?
(sorry.. by whatever reason my reply got posted 4 times.. so strange. I try delete the first three but cant)..
Click to expand...
Click to collapse
Usually when this happens there is something wrong with the USB cable not necessarily the charger. Is the sony cable a USB type cable or a hard wired one? If it is USB type try using it with the other chargers and see what your results are.
Sent from my SAMSUNG-SM-N900A using XDA Premium 4 mobile app
Mad383Max said:
Usually when this happens there is something wrong with the USB cable not necessarily the charger. Is the sony cable a USB type cable or a hard wired one? If it is USB type try using it with the other chargers and see what your results are.
Click to expand...
Click to collapse
Yes indeed I notice the Sony Power Pack cable is short and thick. The Samsung cable is long and thin. I get much higher charging power using the thick short cable. Maybe I need go shop for a proper longer/thicker cable.
VeEuzUKY said:
Yes indeed I notice the Sony Power Pack cable is short and thick. The Samsung cable is long and thin. I get much higher charging power using the thick short cable. Maybe I need go shop for a proper longer/thicker cable.
Click to expand...
Click to collapse
I've certainly found the USB cable makes a big difference to the charging speed. I got a couple of 2m cables off Ebay and they're hopelessly slow, but the stock Samsung cable is fast. I just wish it was a bit longer!
I have the same issue
I have the Sprint Mega. Not refurbished and original factory state but I have horrific charge/discharge issues. Right now, my phone just got to 100% charge which I then unplugged the charge cable. Within 5 mins, I went from 100% to 96% and it is losing battery even quicker.
VeEuzUKY: It's been a while but do you still have this phone? Any updates? I should prob invest in a thicker USB cable like you've describe. It has the most charge rate.
I got my mega 6.3 last week. Since then it has said 100% charged... even when charging or dead. So I got a new battery thinking it was the battery but its obviously not and im not sure what it is that could be the problem. Im not sure if its crucial for my phone, if it can be fixed easily and cheaply, or if I need to return my phone to the place I bought it from.
Hello,
when the tablet was in the charger with 1000 mAh and my GF was playing plant vs zombies 2, it was not enough and was dead in 2 hours. So I put there the official charger 1500 mAh but then still it was not enough and was dead again.
Right now I tried to turn off the Location, Wi-Fi and she is playing. But is this normal??? Jesus you should be able to play with all the functions turned on and in the charger, not???
Edit: so it was emptied again even with everything off...
Edit2: i will try the origin cable because I used a different one
Stirius said:
Hello,
when the tablet was in the charger with 1000 mAh and my GF was playing plant vs zombies 2, it was not enough and was dead in 2 hours. So I put there the official charger 1500 mAh but then still it was not enough and was dead again.
Right now I tried to turn off the Location, Wi-Fi and she is playing. But is this normal??? Jesus you should be able to play with all the functions turned on and in the charger, not???
Edit: so it was emptied again even with everything off...
Edit2: i will try the origin cable because I used a different one
Click to expand...
Click to collapse
Did it show the charging icon while she was playing the game? I'm curious if it might be plugged but not recognizing that it should be drawing power from the charger...
Because charging cables are differently wired, you MUST either use the original cable or a cable which is definitely known to have the same wiring as the original one.
hasenbein1966 said:
Because charging cables are differently wired, you MUST either use the original cable or a cable which is definitely known to have the same wiring as the original one.
Click to expand...
Click to collapse
Differently wired how? I didn't realize there were wiring differences, please elaborate if you can, feel free to get technical.
I tried plugging my Z2 Tablet into a USB cable from a powered hub (computer off though), which I've used to charge my phone and my Kindle, and I know it wouldn't have much power, but it wouldn't charge at all, no charging icon, nothing. I've had no trouble charging it with a dedicated charger though.
~Troop
So yes,
1. the charging icon is there
2. I even logged the history and during playing the plant vs zombies 2, the power is oscilating around +- the same level but still going down slowly as a trend
3. I tried today to get the power back to 25% and now I am charging it. I have the battery widget where it shows getting mA about 390 to 890 maximum. But even it is the original charger, original cable and the charger is 1500 mA it seems that the maximum level is 890???
Can someone else try Batter monitor widget what they get from it???
Edit:
It sucks. It announced even today DURING charging from the original charger and cable that the charging is not strong enough. Wtf?
Edit2:
Here they say it is charged under 3 hours. Not my case :-/ http://www.digitalversus.com/tablet/sony-xperia-z2-tablet-p19609/test.html
Ha, that is really funny. I am from the Czech Republic and called the Sony support. They forwarded me to Xperia support. At Xperia support the girl said that she cannot provide me exact information because official release date here is 8th of April so she doesnt have the manuals etc.
Then my type is 511E3 which she again was absolutely no aware what is the type because I should have 621 or maybe 521 but not 511.
So I can try the support line next week with the question how many mA should go to the tablet during charging.
But what she said was also that the charging time could be up to 6:20. But more than 6 hours? Maybe it was about the Z1 model? And also told me that playing games with the charger will still result in draining the battery.
I need some other guys here who can test it with playing some games and check the mA during charging...
I don't have a Z2, but just wanted to mention that cnet saw the same (no charge while playing) in their review: "[..] the tablet lost power even when it was plugged in to the mains" http://www.cnet.com/products/sony-xperia-z2-tablet/2/.
I never experienced any of this. There's probably a problem with your unit.
zpon said:
I don't have a Z2, but just wanted to mention that cnet saw the same (no charge while playing) in their review: "[..] the tablet lost power even when it was plugged in to the mains" http://www.cnet.com/products/sony-xperia-z2-tablet/2/.
Click to expand...
Click to collapse
bbarou said:
I never experienced any of this. There's probably a problem with your unit.
Click to expand...
Click to collapse
And have you tried to charge it during heavy playing of some game? Which game, how long?
Can you test how much mA are you getting from the charger inside the tablet (battery monitor widget can do this)
I tried it yesterday playing "The Cave" for about 1 hour. Tablet was charging using a four port no name charger and a different cable the that the one provided.
I did not really check for anything , I just noticed the tablet got mildly hot.
I did not measure the current while playing, but I did earlier this week-end though.
I tested 3 chargers plus the provided one. A Galaxy S III charger, An ASUS TF300 and the 4-port no-name I used yesterday.
If I recall correctly I got around 0.9A from the GS3 and original charger and around 1.2A from the TF300 and 4-port ones.
I do some more thorough testing and let you know. I use a device on the charger output to measure how much current is coming through.
How long do you guys charge the tablet? I started with about 19% and to full 100% it was like 7-8 hours. It was turned on without wifi (stamina mode). I will try to charge it while turned off but still it is strange...
I dont know. Battery life is ok but the charging sucks for me. Any ideas if it is just me?
Stirius said:
How long do you guys charge the tablet? I started with about 19% and to full 100% it was like 7-8 hours. It was turned on without wifi (stamina mode). I will try to charge it while turned off but still it is strange...
I dont know. Battery life is ok but the charging sucks for me. Any ideas if it is just me?
Click to expand...
Click to collapse
Yawn... Please use the charger and the cable which come with the device (which I bet my grandma on you didn't)! Other chargers or cable have either too low current or wrong wiring (which disables fast charging) or both.
The charging time over USB is 4-5 hours, like the first generation Tablet Z.
Yawn, yawn, if you took a look then you would read from this topic that I use original cable and original charger.
If the battery is 6600 mA and charger 1500 mA then the minimum for charging is 4,3 hours approximately. And as I said my maximum charging is 890 mA. So either something is taking 600 mA during the charging or the charger is bad or the cable is bad or I dont know.
But if it is in the stamina mode and still the maximum charging is 890 mA then something is weird.
I am asking now for about 5 times. Could somebody test during charging how many mA is going into the tablet? (You can use Battery Monitor Widget from google play).
Neither Xperia support is able to give me clear answer because the Tablet was not officially released here (which is funny, I have it).
Thank you.
Stirius said:
Yawn, yawn, if you took a look then you would read from this topic that I use original cable and original charger.
If the battery is 6600 mA and charger 1500 mA then the minimum for charging is 4,3 hours approximately. And as I said my maximum charging is 890 mA. So either something is taking 600 mA during the charging or the charger is bad or the cable is bad or I dont know.
But if it is in the stamina mode and still the maximum charging is 890 mA then something is weird.
I am asking now for about 5 times. Could somebody test during charging how many mA is going into the tablet? (You can use Battery Monitor Widget from google play).
Neither Xperia support is able to give me clear answer because the Tablet was not officially released here (which is funny, I have it).
Thank you.
Click to expand...
Click to collapse
Dude, then simply go and exchange the charger if it is faulty. No need to make long XDA threads out of that.
hasenbein1966 said:
Dude, then simply go and exchange the charger if it is faulty. No need to make long XDA threads out of that.
Click to expand...
Click to collapse
Its not about charger. Or maybe it is. I want to know exactly how many mA are going to the tablet during charging. Nobody was able to give me the answer.It could be faulty charger, faulty cable, messy apps in the tablet (which I doubt) or whatever.
And Sony support, Xperia support is not able to give me clear answer to this. And also another guy in a review had similar problem. If we are in a Z2 Tablet topic then I supose that this is the right place to ask such questions... Not?
You can't just do 6600 divided by 1500. You are losing current all over the place when charging. It will probably be at least 50% wastage in heat, resistance in the wires etc etc. Also, the charger may say it does 1500, but that is peak when it's brand new under perfect conditions and the internal components will age and become less efficient over time too.
If you are using the tablet for a game, it will be running the processor at max power and drawing lots of current and all the heat it generates from the cpu and the battery during this time is wasted energy don't forget. If you want to battery to charge, you will need a charger that provides enough current to power the tablet and another 1000ma or so on top of that to charge your battery.
I bet Sony will state somewhere that you can only use it for low power activities like watching videos while on the dock if you want the battery to charge.
Sent from my GT-P5110 using Tapatalk
My portable power meter seems broken so I cannot give you actual current draw measured in series. All I can do is paste output from Battery Monitor Widget.
All tests done with the official USB cable bundled with the tablet and screen ON at minimum brightness. Screenshots from Battery Monitor Widget.
Code:
Battery only: -721 mA (-10.79%/h)
Official charger (1500mAh): +719 mA (+10.76%/h)
PC USB3 port: -48 mA ( -0.71%/h)
No-name Chinese AndroidPC Charger
Model LA-520 (2000mAh): +1060 mA (+15.86%/h)
Energy Sistem K128 Charger (2100mAh): +960 mA (+14.37%/h)
brugobo said:
My portable power meter seems broken so I cannot give you actual current draw measured in series. All I can do is paste output from Battery Monitor Widget.
All tests done with the official USB cable bundled with the tablet and screen ON at minimum brightness. Screenshots from Battery Monitor Widget.
Code:
Battery only: -721 mA (-10.79%/h)
Official charger (1500mAh): +719 mA (+10.76%/h)
PC USB3 port: -48 mA ( -0.71%/h)
No-name Chinese AndroidPC Charger
Model LA-520 (2000mAh): +1060 mA (+15.86%/h)
Energy Sistem K128 Charger (2100mAh): +960 mA (+14.37%/h)
Click to expand...
Click to collapse
Thanks a lot!
So it just means that in general with the original charger you are able to get to 10-13% per hour. So in average usage 9 hours of charging, heh. I saw yesterday (have to check it at home) that I had also around 20% per hour.
But in general these figures are normal and the usage of a battery with a little bit more heavy tasks is not very good. And charging can take a LONG time. I tried to charge it while turned off and I think you can get there below 6 hours.
Stirius said:
Thanks a lot!
So it just means that in general with the original charger you are able to get to 10-13% per hour. So in average usage 9 hours of charging, heh. I saw yesterday (have to check it at home) that I had also around 20% per hour.
But in general these figures are normal and the usage of a battery with a little bit more heavy tasks is not very good. And charging can take a LONG time. I tried to charge it while turned off and I think you can get there below 6 hours.
Click to expand...
Click to collapse
mm.after read all of reply above, it is quite weird that only get 800mah while using 1500mah support charging cable? Maybe can try better quality of cable and also the power source, it is very crucial to get that. I have try some trial and error with different cables and charging with my galaxy s3, i find that with good quality of cable, i managed to get 1000mah max , but if using with cheap cable or power bank, i only managed to get 400-800mah. even after a long time using the original s3 cable, it will reduce to only 600mah. So my advice is try charging with different cable and find the best cable to charge ur device, if it is 1500mah supported, so i think it should be support to 1500mah. Thank you.
yonghong said:
mm.after read all of reply above, it is quite weird that only get 800mah while using 1500mah support charging cable? Maybe can try better quality of cable and also the power source, it is very crucial to get that. I have try some trial and error with different cables and charging with my galaxy s3, i find that with good quality of cable, i managed to get 1000mah max , but if using with cheap cable or power bank, i only managed to get 400-800mah. even after a long time using the original s3 cable, it will reduce to only 600mah. So my advice is try charging with different cable and find the best cable to charge ur device, if it is 1500mah supported, so i think it should be support to 1500mah. Thank you.
Click to expand...
Click to collapse
No, it is not weird at all since the tests were done with the screen turned ON, draining half the power.
The first line, battery only, tells you how much the screen and semi idle state is draining, with brightness at minimum. Cranking brightness up to maximum increased an extra 2.5% per hour drain if I recall correctly.
Charging with screen off would be about 20% per hour, or 5 hours to fully recharge. More or less in line with what people is reporting.
Code:
Battery only: -721 mA (-10.79%/h)
Official charger (1500mAh): +719 mA (+10.76%/h)
So, 721+719= 1440 (+21%/h), pretty close to the rated 1500 for the charger.