[Q] battrey problem with CM9 - Barnes & Noble Nook Tablet

Hi evry body.
i instaled cm9 rom on my 16 GB nook tablet yesterday. evry thing was good but my battery is finishid and do not charge again. . i plug in pc.. it wrute battery low to turn on please wait 15 minute. after 2 hours write that yet! plzzzzzzz help me ..

I use CM9 .04, which doesn't have the ICS kernal, and battery is acceptable and it charges. What CM9 are you using?

Don't try to charge it via the PC. Charge it from the A/C charger.

miniblue said:
I use CM9 .04, which doesn't have the ICS kernal, and battery is acceptable and it charges. What CM9 are you using?
Click to expand...
Click to collapse
I use cm9 alpha.4 but battery not charged please help me someone

Are you trying to charge it via the pc only?

Cubanluke88 said:
Are you trying to charge it via the pc only?
Click to expand...
Click to collapse
Yes i tried.
I found that it charged when the tablet off or in sleep mode. It's normal??? What can I do to solve this problem??

ah, ( light bulb goes on inside head ) your power is 220 volts, 50 cycles. you "really" need to use the wall charger to get the 1.9 amps of current. the stock b&n charger module says it will take your 220 volts, 50 cycles ? ? so a plug adapter will allow you to get great charging current ? yes ?

fyi if anyone cars. i was just in hungary and i was charging my nook tablet with no converter so anyone that is worried about the nook frying with 220 it wont and i agree you have to use the wall. ive never seen the pc strong enough to charge my nook

Related

[Solved] battery drained out and now stuck on battery charging screen

Hi,
I flashed the newest CyanogenMOD nightly on my SGS II previously running Villain ROM 2.1 with CF-Root kernel. Things were ok but I missed out on battery getting extremely low. After some time the phone went dead [due to complete battery drain] so I plugged it via USB cable to my laptop's USB port. Now it's been over an hour and all I see is the empty battery symbol re-flashing every 3 seconds [It's the same grey empty battery with a circle in middle].
I have tried booting the phone normally as well as in recovery but nothing happens! The battery empty symbol keeps flashing. I tried accessing download mode but it says "Battery Low. Can't Download". Can anyone please help me with this ?
Should I wait for couple of more hours or is my phone screwed, bricked or whatever....
Please try your AC adapter to charge. Keep it charging overnight just in case.
don't have the AC adapter now because it's in my office. But tomorrow this is the first thing that I'll do when I go there. will report if it works....
I hope it will work. Just keep it charging. That battery needs a kick in the A.
prodygee said:
I hope it will work. Just keep it charging. That battery needs a kick in the A.
Click to expand...
Click to collapse
This was really what it needed I am sorry to reply so late because I forgot about the thread. And as long as the issue is solved, I would request moderator to close this or move to archive...
aliwaqas said:
This was really what it needed I am sorry to reply so late because I forgot about the thread. And as long as the issue is solved, I would request moderator to close this or move to archive...
Click to expand...
Click to collapse
For how long did you keep the phone charging till you could turn it on?
testando said:
For how long did you keep the phone charging till you could turn it on?
Click to expand...
Click to collapse
Around 25 minutes with original charger that came with phone...
Have the same problem, using original charger but is not taking any charge, keeps turning on and off trying to charge, battery is out of juice for like 2 months, should I let it keep trying?
bidomo said:
Have the same problem, using original charger but is not taking any charge, keeps turning on and off trying to charge, battery is out of juice for like 2 months, should I let it keep trying?
Click to expand...
Click to collapse
Your battery needs shock
Wrap it in a plastic case and seal it, put it in deep fridger for 3 -4 hrs, take it out and leave it until it gets the room temprature.
Now you need to charge it with slighly higher amp voltage charger and hopefully it will revive
Sent from my GT-I9100 using xda premium
LENOVO A6000 Confusing owner
I've got a problem in my phone, currently using a custom rom 7.1.2 by resurrection Remix on Lenovo A6000, I charged the battery normally upto 100, its discharge was normal till 71 percent. The battery dropped directly from 71 to 50 and now it has been at least 3hours that it is showing 50 percent. Few days ago I got another problem, the battery was 70 percent and then dropped to 53percent and then showed 69 percent. Anyone can help me please? I just wanna know if its just a minor bug or my battery has been screwed...

[Q]P500 USB charging too slow or not?

Hey all P500 owners, I recently bought one, and have been happily using it for a week now. I have a question though, how long does a full-charge take through pc usb? mine is like ~8 hours.
how about yours?
thx very much in advance!
nus.thomaskirk said:
Hey all P500 owners, I recently bought one, and have been happily using it for a week now. I have a question though, how long does a full-charge take through pc usb? mine is like ~8 hours.
how about yours?
thx very much in advance!
Click to expand...
Click to collapse
That's normal. If you charge using wall plugs its 2-3 times faster
nus.thomaskirk said:
Hey all P500 owners, I recently bought one, and have been happily using it for a week now. I have a question though, how long does a full-charge take through pc usb? mine is like ~8 hours.
how about yours?
thx very much in advance!
Click to expand...
Click to collapse
Wouldn't suggest charging it on the computer to often though, your not charging it to its full potential
Jeanjacq said:
Wouldn't suggest charging it on the computer to often though, your not charging it to its full potential
Click to expand...
Click to collapse
I remember from a thread it said charging via USB once in a while is beneficial to battery life..
if charged thru usb u will get long battery life. try it
the way i remember is you charge whenever possible, keeping the battery between 20% and 80%.
Charging via USB is actually a bit better because it is slower, ensuring a good charge. Wall charging is good too, but car chargers for example are not really recommended since they use a pretty high voltage, which can affect the battery. Of course CMIIW.
Yeah, I think a slower charge is better for the battery as it does not get as hot. My usb charge takes about 4-5 hrs while the wall charge takes about 2-3

[Q] battery issue? decrease of % when the phone is charging

Hello i've having a small problem with my battery of my xperia x10. i'm putting the phone for charging and instead of increasing the charging % is decrease it but i dont know why. sometimes i'm leaving the phone for charging all night and when i'm waking up i saw that my battery is not fully charged. is this a rom problem or battery problem?
btw i'm having lock bootloader, stock kernel and this custom rom Achotjan_Stock_Remplacement_And_Firmware Update
thanks a lot
It is normal....battery heats up and then starts draining, just unplug it for 5mins and then replug...now it will charge normally...and dont put your phone on charging whole night...that may decrease battery life...
Try it !!!
because nowadays batteries don't charge all the time! They're intelligent, so they charge up to 100%, stop charching, its going down till 92-94% and then recharging up to 100%, and then stop again..... so thats why even if you let you're phone charge for 10h you might end up with a 92% charged phone!
Haldi4803 said:
because nowadays batteries don't charge all the time! They're intelligent, so they charge up to 100%, stop charching, its going down till 92-94% and then recharging up to 100%, and then stop again..... so thats why even if you let you're phone charge for 10h you might end up with a 92% charged phone!
Click to expand...
Click to collapse
yes but the problem if my battery is 10% and i put it for charge after few minutes is goes to 8% or is degrease instead of increase. why?
giwrgos said:
yes but the problem if my battery is 10% and i put it for charge after few minutes is goes to 8% or is degrease instead of increase. why?
Click to expand...
Click to collapse
Bad usb cable? Or bad charger.
I have a usb cord that will charge my x10 but not Ion.
From market get 'current widget' app. With it you can read how much amps coming from charger. A usb charger should be about 400 ma, milli-amps or .4 amps.
~Jaramie
from my LT28at rooted & eating an Ice Cream Sandwich
ToledoJab said:
Bad usb cable? Or bad charger.
I have a usb cord that will charge my x10 but not Ion.
From market get 'current widget' app. With it you can read how much amps coming from charger. A usb charger should be about 400 ma, milli-amps or .4 amps.
~Jaramie
from my LT28at rooted & eating an Ice Cream Sandwich
Click to expand...
Click to collapse
i have tested it. at the beginning started with 400-450 after a few minutes went to 100ma
giwrgos said:
i have tested it. at the beginning started with 400-450 after a few minutes went to 100ma
Click to expand...
Click to collapse
Ok so that means the charger is working.
Did you notice the battery temp? compare the temps from before, during, and when it drops .
From 0% to 100% charge takes you how long? Should be 1-3 hours.
Leaning to bad battery as reason.
~Jaramie
from my LT28at rooted & eating an Ice Cream Sandwich
ToledoJab said:
Ok so that means the charger is working.
Did you notice the battery temp? compare the temps from before, during, and when it drops .
From 0% to 100% charge takes you how long? Should be 1-3 hours.
Leaning to bad battery as reason.
~Jaramie
from my LT28at rooted & eating an Ice Cream Sandwich
Click to expand...
Click to collapse
i think it was 50%
giwrgos said:
Hello i've having a small problem with my battery of my xperia x10. i'm putting the phone for charging and instead of increasing the charging % is decrease it but i dont know why. sometimes i'm leaving the phone for charging all night and when i'm waking up i saw that my battery is not fully charged. is this a rom problem or battery problem?
btw i'm having lock bootloader, stock kernel and this custom rom Achotjan_Stock_Remplacement_And_Firmware Update
thanks a lot
Click to expand...
Click to collapse
I have the same problem on x10 mini u20i.. I had in on stock, and now I have it on miniCM7-2.2.1.. I've been reading a bit, and I think it is a hardware issue..
My phone simply won't charge, if I plug it into a regular charger.. The phone will seem like it charges, but in reality the battery is draining (might even be draining faster than when is simply unplugged).
If I leave it charging through the night, the phone will be completely dead in the morning, and sometimes I have to leave the phone connected to my pc for hours, before it gains a little bit of juice and starts actually charging.
In fact the only way (I know of) to charge my phone, is to connect it to a pc with a USB cable, and even then I mostly have to connect the phone, disconnect it and the connect it again for the charging to initiate.
I read somewhere, that a guy was only able to charge his phone with the charger from the cigarette lighter in his car. He mentioned (from what I remember), that the cigarette lighter ran at 12V, but the normal cell phone chargers runs at 6V, and that causes problems for the x10 (mini). I have no idea if he is right though.. Does anybody know if this is a valid point or BS?
Anyway for a quick workaround, charge the phone from you PC
papagoejoe said:
I have the same problem on x10 mini u20i.. I had in on stock, and now I have it on miniCM7-2.2.1.. I've been reading a bit, and I think it is a hardware issue..
My phone simply won't charge, if I plug it into a regular charger.. The phone will seem like it charges, but in reality the battery is draining (might even be draining faster than when is simply unplugged).
If I leave it charging through the night, the phone will be completely dead in the morning, and sometimes I have to leave the phone connected to my pc for hours, before it gains a little bit of juice and starts actually charging.
In fact the only way (I know of) to charge my phone, is to connect it to a pc with a USB cable, and even then I mostly have to connect the phone, disconnect it and the connect it again for the charging to initiate.
I read somewhere, that a guy was only able to charge his phone with the charger from the cigarette lighter in his car. He mentioned (from what I remember), that the cigarette lighter ran at 12V, but the normal cell phone chargers runs at 6V, and that causes problems for the x10 (mini). I have no idea if he is right though.. Does anybody know if this is a valid point or BS?
Anyway for a quick workaround, charge the phone from you PC
Click to expand...
Click to collapse
BS . 12 volts is the input volts for a car charger. All micro-USB chargers should run @ 5 volts and vary in amps. Your phone has smart charger built into kernel. The charger itself is just a power supply. Kernel controls the applied amps.
~Jaramie
from my LT28at tweaked with Ice Cream all over it.
ToledoJab said:
BS . 12 volts is the input volts for a car charger. All micro-USB chargers should run @ 5 volts and vary in amps. Your phone has smart charger built into kernel. The charger itself is just a power supply. Kernel controls the applied amps.
~Jaramie
from my LT28at tweaked with Ice Cream all over it.
Click to expand...
Click to collapse
Yeah I kinda thought so.. I would think that it made no difference where the power came from, but my phone seems to disagree.. It simply does not charge, unless I plug the USB cable into a computer..
And it will only take seconds of googling to find out, that lots of people have this or similar problems..
Anyway, OP and others, the only answer I've found, is that the microUSB port easily gets dirty, and the right amount of wiggling with the cord or cleaning the microUSB port with a dry (!) toothbrush and a vacuum cleaner or air blower might help..
Charger
giwrgos said:
i have tested it. at the beginning started with 400-450 after a few minutes went to 100ma
Click to expand...
Click to collapse
You'll probably need a new charger, but a generical USB charger is very, very cheap.
Before buying the new one, is useful testing your old device this way:
Please, try to charge your mobile using a computer. If you charge normally you've confirmed that your trouble is in the charger (since in that case your battery is OK and your USB cable and connectors are also OK).
But if you can't charge even in your computer, please do experiment another USB cable. If even so you can't charge, the culprit will be the battery or the USB connector (less probable).
I'm not sure if this is relevant but I had a simular issue like this but not all the time. Was a kernel issue, but before you jump into flashing a new kernel or rom, have you tried charging the phone after you've switched it off?
Sent from my X10 using xda app-developers app
giwrgos said:
Hello i've having a small problem with my battery of my xperia x10. i'm putting the phone for charging and instead of increasing the charging % is decrease it but i dont know why. sometimes i'm leaving the phone for charging all night and when i'm waking up i saw that my battery is not fully charged. is this a rom problem or battery problem?
btw i'm having lock bootloader, stock kernel and this custom rom Achotjan_Stock_Remplacement_And_Firmware Update
thanks a lot
Click to expand...
Click to collapse
I had the same problem on my xperia x10 mini, when being charged it increases at first, after a few minutes the % decreases, What I did is I flashed a new kernel the nAa kernel for gingerbread and installed a custom rom, which is CM7 2.2, and voala!, I was surprised that its working again, I send the phone to sony ericsson support center and they said it had board damage, but what I think is that there was a proble on the kernel update to eclair or 2.1 that's why it happened, so just try flashing a new kernel using the flashtool, gud luck mate...
PLZ HELP
PLZ HELP..... MY PHONE x10 mini
pro....android vesion 2.1.......
Heats up while surfing internet on
2g network and the battery is also
heated up and drained so quickly
(just 10 percent from 100 percent
in 40 minutes as compared to wifi
which runs for atleast 2.5 hours)
.the loud speaker gives very very
humble sound (the same sound
when a cell phne during call is put
near a AM radio)......how to correct
it????
ahsanbhai420 said:
PLZ HELP..... MY PHONE x10 mini
pro....android vesion 2.1.......
Heats up while surfing internet on
2g network and the battery is also
heated up and drained so quickly
(just 10 percent from 100 percent
in 40 minutes as compared to wifi
which runs for atleast 2.5 hours)
.the loud speaker gives very very
humble sound (the same sound
when a cell phne during call is put
near a AM radio)......how to correct
it????
Click to expand...
Click to collapse
Install a 2.3 based rom mate this should remedy the problem
Requires unlock bootloader first if you have not done already
http://forum.xda-developers.com/showthread.php?t=986692
Then install this rom this is bugless in my opinion
http://forum.xda-developers.com/showthread.php?t=2357273
$€NT FR0M MY L!F€ $UPP0RT [email protected]!N€

Phone takes more than 24hrs to charge

My phone has to charge more than 24 hours to fully charge...I'm using the stock wall charger and i'm on KitKat 4.4.2 Teamsek unofficial v42 using Boeffla Kernel 2.2 beta1. What to do ?
Reyko97 said:
My phone has to charge more than 24 hours to fully charge...I'm using the stock wall charger and i'm on KitKat 4.4.2 Teamsek unofficial v42 using Boeffla Kernel 2.2 beta1. What to do ?
Click to expand...
Click to collapse
must be your charger. try an other charger ?
3 25338285
PAYload1976.dl said:
must be your charger. try an other charger ?
Click to expand...
Click to collapse
Will do but I also noticed that my wifi is always on even if I turn it off.
reset your battery info
Reyko97 said:
My phone has to charge more than 24 hours to fully charge...I'm using the stock wall charger and i'm on KitKat 4.4.2 Teamsek unofficial v42 using Boeffla Kernel 2.2 beta1. What to do ?
Click to expand...
Click to collapse
root your phone ,and reset you battery info,and take a deep charge
Reyko97 said:
Will do but I also noticed that my wifi is always on even if I turn it off.
Click to expand...
Click to collapse
Maybe the charger or just the cable may be faulty so you need to check first.
Second, if you are turning off wifi from the toggle, then try turning it off from the settings manually. If you think this is related to the ROM, then you can ask in the relevant thread for assistance.
~ RazorMC
chujung24 said:
root your phone ,and reset you battery info,and take a deep charge
Click to expand...
Click to collapse
How do i reset my battery and deep charge ?
1. Slow charging is because bad charger (if you have root and for example Boeffla kernel, you can force fast charge).
2. Wifi always on is because you have set in wifi -> advanced ->always allow searching for accurate location.
The names of path and settings are probably wrong, because i have Czech language, so i dont know how it is called in English.
Solution:
1. buy new charger
2. turn off searching wifi for location purposes.
Before buying a new charger altogether, you can just test what happens if you try to charge it via usb port, you should have a microsd cable lying around somewhere. USB ports only give 500mA but it should still charge in a few hours.
If it still doesnt charge, it might be either the charger module in the phone or the battery. I had a faulty microusb input in my old i9100, it prolonged charging hours.
charge to 100%,open rootexploer ,find /data/system/ba tterystats.bin,delet it,never charge it until it drains completely。
Switched chargers and now it charges in 3 hours...
Since you're on Boeffla Kernel, you can download and use "Boeffla-Config" and increase the AC charging current from 1100 mA to a higher number and turning off Ignore Unstable Power and Ignore Safety Margin.
And increase USB charging current from 475 to 500 mA this will provide you with faster charging speeds.
P.S Increasing USB Charge Current To anything beyond 500 mA has no effect on USB 2.0 ports since these ports provide only 500 mA output current no more.

[Q] Charging not strong enough?

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)
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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.
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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.
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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.

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