[Q] Is Slow Charging Through USB Normal Behaviour? - Sony Xperia Z Ultra

Just got my ZU yesterday. I noticed that charging was exceptionally slow when I was charging from USB port to phone - I was getting warning messages telling me the phone was draining faster than charging while I was doing trivial things and it took many, many hours to go from 0 to 70% or so.
However charging rates seem a lot faster when I plug the USB into AC power - haven't timed it but I'd hazard a guess it's close to 2 hours for a full charge which seems to what a lot of people say is "normal" for them.
So my question is is USB charging meant to be like this? And if not is there something I can do to rectify it?

diji1 said:
Just got my ZU yesterday. I noticed that charging was exceptionally slow when I was charging from USB port to phone - I was getting warning messages telling me the phone was draining faster than charging while I was doing trivial things and it took many, many hours to go from 0 to 70% or so.
However charging rates seem a lot faster when I plug the USB into AC power - haven't timed it but I'd hazard a guess it's close to 2 hours for a full charge which seems to what a lot of people say is "normal" for them.
So my question is is USB charging meant to be like this? And if not is there something I can do to rectify it?
Click to expand...
Click to collapse
Yes this is near normal, although I have only seen that warning once or twice when charging on USB
When charging on the wall/AC the phone will charge at about 1300 - 1400 mA, you hace a 3000mAh battery so a full charge will take just over 2 hours
When charging on USB the max the phone can draw is 500mA, so will take 3 times longer, so well over 6 hours - with out use.
**Normal usage is about 200 - 400mA at about 1/2 screen brightness and just web browsing, full CPU/GPU/screen will probably draw about 600 - 800mA from the battery
the last point ** is from memory so could be a little out

Thanks for the reply. It's wierd because I never noticed an issue like this with my Note (I'm assuming you're saying the limitation is the USB port not the phone perse).

diji1 said:
Thanks for the reply. It's wierd because I never noticed an issue like this with my Note (I'm assuming you're saying the limitation is the USB port not the phone perse).
Click to expand...
Click to collapse
500mA is a USB limitation although some computers can supply more.

blueether said:
500mA is a USB limitation although some computers can supply more.
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Click to collapse
I got told by someone I was chatting with that supplying 500mA means the USB port is compliant to USB 2 specifications. However apparently devices can request more from the port which will supply that if it's able - I don't know if this is the case but this does fit in with the fact that I never noticed the slower charging with Samsung devices.

blueether said:
500mA is a USB limitation although some computers can supply more.
Click to expand...
Click to collapse
My usb 3.0 port can give more power but phone still charges only with 500mA.

MusterMaxMueller said:
My usb 3.0 port can give more power but phone still charges only with 500mA.
Click to expand...
Click to collapse
Yeah this guy was saying the device actually has to request the additional current - I'm just going on what he says, I have no idea as to it's correctness.

It is some thing like that.
Sent from CarbonROM on my Z-Ultra

Related

[Q] charging question

Hi
i'm wondering if is it normal that charging through USB is quite slower than AC.
i mean, connected to PC it takes about 10 mins to charge 1% and when connected to wall connector, it takes like 2 mins to 1% (it's an example, didnt measure it exactly)
i searched in the forum and found nothing related to this.
fdomartineza said:
i'm wondering if is it normal that charging through USB is quite slower than AC.
Click to expand...
Click to collapse
Yes, less power longer charge.
XperiaX10iUser said:
Yes, less power longer charge.
Click to expand...
Click to collapse
Power is the same, current is different. 500mA from your computer 700mA from the charger.

[SOLVED] Atrix will not power on, green light flashes, plugged in and.... nothing!

Went to sleep last night with my Atrix plugged in as I normally have had all my phones, was playing with it right before I went to sleep and everything worked just fine, woke up this morning and the phone will not power on!
First tried to power it on unplugged and the green light flashed for 2 seconds, and nothing happened. Okay, weird, but I'll go with it. Plugged it in, and the green light stays on now until I press the power button! Once pressed, it flashes off, flashes on for 2 seconds and stays off. Nice. I thought the green light meant it was fully charged - when I woke up this morning, it had no green light on, but it was plugged in just fine all night - grabbed my Jawbone ERA and plugged it in to the charger I had the Atrix connected to and it started charging right away, so I know it works....
Pulled the battery, tried plugging it in and power it on without the battery. Nothing. Tried putting in the battery and plugging it in again to "jump start it" as I had done yesterday when I first got it - apparently you can't just charge the thing when connected to a laptop if the phone is off, it will power on even if you power it off again! Nothing.
What the hell happened in it's sleep? I KNOW rooting it didn't cause sleep death.... This thing doesn't have a custom ROM or any undervoltage adjustments, so why the hell is it acting up??? Damnit, right when I got EVERYTHING set up the way I wanted it too.... can't bring it in to the store and give it up with all my personal stuff on there now, I need this thing to power on to wipe it first!!! I'm leaving it connected to the laptop with the green light on for a while and will see what happens in an hour or so....
EDIT - just searched for and tried to hard reset the phone from this thread, the phone still won't even power on to get to the recovery screen!!!
UPDATE - see below and use the SUPPLIED Moto AC charger or at least one with over 5.0V - NOT a PC and NOT a USB hub!
use the charger that came with the phone. My old HTC ones won't charge the phone for some reason. I bet your battery is just dead.
Did you use the provided charger? I tried plugging my Atrix in to the charger I used for my N1, and found that it did not provide enough current. With the old charger, after the phone died, I had similar symptoms where the green light would flash but phone would not come on. Plugged it in with the Moto provided charger, and 5 minutes later all was good...
I had the same problem. Thought I was gonna have to take it back to the store. I don't know what the problem was but I took the battery out for 5 minutes. Then I plugged it into the wall charger(wouldn't work with PC). I didn't turn it on for 30 min, just left it on the charger. Then I hit the volume rocker and it showed the battery charging symbol which it didn't do before. And then I was able to power it on
Same thing here. I purposely drained my battery on the first use. Plugged the usb cable into the PC and nothing. Same blinking green light with no response. I also thought I'd have to return the phone. Then for S & Gs I plugged it into the wall charger and it came to life. Once I got the battery charged a little bit I plugged it into the PC and it started to charge again. Don't know why, but it worked.
Have been running around the house trying to find valid outlets, and that does indeed appear to be the problem. I found it out the hard way though, should have kept an eye on the thread - used a power outlet instead of a PC USB connection and the screen fired right up! Yes, the phone showed the battery with 0% in it, but at least the screen finally came on!
How I have my phone set up normally is connected to my charging valet on my dresser, connected with a 15 foot USB cable that plugs directly into my desktop. Since the extension is good for just one USB connection, I have that connected to a USB hub and then a MicroUSB cable connects my phone from there. The Captivate, and all the other phones I've ever used, not to mention my Zune and Jawbone ERA, all eat that up and have no issues since the USB hub is powered not by the computer (seven USB cables is just too many for a single PC connection) but by the power outlet in the charging valet. I wonder if the hub is distributing the power requirement for each device and the Atrix needs more than others.
I also figured out that the Moto charger has a 5.1V output on it, as does my Jawbone AC charger. Now I need to start making sure that my each one of my chargers in the cars I own has that same type amount of juice too! You go up 29% in battery capacity and so do the requirements to charge it, huh?
Thanks for all the help, marking this SOLVED....
I used the charger in my bedroom that I've used for the Captivate and others before it and it didn't provide enough juice to charge the Atrix. It quickly switched between charging and not charging. I still had 40% battery showing when I woke up though which was nice. It had been off of charge since 10am yesterday.
Plugged it into an HTC charger and it's fine. The one that didn't work is not a modular charger so the power cord is hard wired to the plug.
Alright, a quick update.... Got the phone charged to 100% while it was off and plugged into the AC outlet with the Moto charger. Put my SIM card back in it - couldn't be without a phone all day! - and fired up the Atrix. Went to Battery Info to see what the status is and while plugged into my USB hub, it says
Battery Status: Discharging
Power plug: USB
....
Battery Voltage: 4124 mV (or 4.124V)
Click to expand...
Click to collapse
What the hell? Then I went right after that and plugged it into the Moto AC charger, it says:
Battery Status: Full
Power plug: AC
....
Battery Voltage: 4207 mV (or 4.207V)
Click to expand...
Click to collapse
Why are POWERED USB hubs and PCs not strong enough to charge the phone? I tried ALL my outlets in my vehicles just now and they ALL show full battery status and plugged into AC! Who screwed this up????
GarciaM25 said:
Why are POWERED USB hubs and PCs not strong enough to charge the phone? I tried ALL my outlets in my vehicles just now and they ALL show full battery status and plugged into AC! Who screwed this up????
Click to expand...
Click to collapse
Did you download the PC Charging Drivers that Motorola requires you to have in order to charge via PC and USB cable? If not, look here.
Battleship said:
Did you download the PC Charging Drivers that Motorola requires you to have in order to charge via PC and USB cable? If not, look here.
Click to expand...
Click to collapse
Wait, you have to have specific drivers on the PC so that the phone will allow a power cable (let's not even worry about it being a USB cable for a second) to charge the phone properly? I have the Motorola Media Link software installed, and that has a ton of drivers on it, that wasn't enough? MORE drivers are required to charge a cell phone? This is madness!
Sorry about the necromancy, but had this problem myself but it is NOT due to a lack of voltage. Thought I'd actually solve this, the problem is CURRENT.
USB2 ports will only ever supply 500ma which simply isn't enough to charge the atrix when it's dead. USB2 powered hubs won't supply any more than this either to meet the USB2 spec. The fact that the AC adapter works is because they tend to have a higher output current in the region of 1-2 amps (you may notice the phone, or any other device for that matter, charges faster with AC adapters for this reason).
On a similar note, cheap car chargers only output 500ma. I know with my desire I can have it plugged in and it charges, but if I use GPS it actually draws more current than it can charge at resulting in the battery draining (albeit, slowly).
So, make sure you have a higher current AC/Car charger, or alternatively, plug it into a USB3 port to charge as USB3 spec allows 900ma (some mobos output up to 1A) which is enough to charge the Atrix.
Stewge said:
Sorry about the necromancy, but had this problem myself but it is NOT due to a lack of voltage. Thought I'd actually solve this, the problem is CURRENT.
Click to expand...
Click to collapse
Hey, no problem, if there's something I misstated, then please, correct it!
Stewge said:
So, make sure you have a higher current AC/Car charger, or alternatively, plug it into a USB3 port to charge as USB3 spec allows 900ma (some mobos output up to 1A) which is enough to charge the Atrix.
Click to expand...
Click to collapse
Not sure about this..... It's been about a year since I got all my USB3.0 gear, and I was super excited about it because I thought that my phone would charge ridiculously fast because of the added output, but I remember reading that 3.0 uses extra pins and those pins account for the added voltage and bandwidth of the cable - we don't have those extra pins when you step down from 3.0 to 2.0, so we lose the ability to charge devices faster as a result. I don't know if I actually proved that theory, but after I read up enough on it, I thought I just didn't have to with that knowledge..... again, correct me if I'm wrong, I've got a lot of 3.0 gear here!!!
GarciaM25 said:
Not sure about this..... It's been about a year since I got all my USB3.0 gear, and I was super excited about it because I thought that my phone would charge ridiculously fast because of the added output, but I remember reading that 3.0 uses extra pins and those pins account for the added voltage and bandwidth of the cable - we don't have those extra pins when you step down from 3.0 to 2.0, so we lose the ability to charge devices faster as a result. I don't know if I actually proved that theory, but after I read up enough on it, I thought I just didn't have to with that knowledge..... again, correct me if I'm wrong, I've got a lot of 3.0 gear here!!!
Click to expand...
Click to collapse
There are indeed extra pins in the USB3 standard but these are to transmit data only. The original USB2 data pins are only there for legacy support and USB3 transmissions use the extra lines. There's still only the 1 VBUS pin which supplies the +5V power. There's also no harm in offering higher current on the connection as a device will only ever draw as much current as it needs until it tops out the supplier, not the other way round
EDIT: Another solution could be to use a splitter cable (common with 2.5" drives)so you can draw from 2 ports, but with a micro connector. I've never actually seen one with USB micro but a quick look on ebay says they do exist
nsaia said:
Same thing here. I purposely drained my battery on the first use. Plugged the usb cable into the PC and nothing. Same blinking green light with no response. I also thought I'd have to return the phone. Then for S & Gs I plugged it into the wall charger and it came to life. Once I got the battery charged a little bit I plugged it into the PC and it started to charge again. Don't know why, but it worked.
Click to expand...
Click to collapse
Hi, can I know that when you plug it into the wall charger, is there any light on? Mine has no light on when plug to wall charger. But I can get the light green when plug into PC USB. Can you share that?
cscmf99 said:
Hi, can I know that when you plug it into the wall charger, is there any light on? Mine has no light on when plug to wall charger. But I can get the light green when plug into PC USB. Can you share that?
Click to expand...
Click to collapse
This is the exact same issue that I am facing now. Did you ever manage to find a solution for this problem?
atrix 4g not coming on
Is there any real fix to this issue i have search high and low and all i am seeing people talking about the battery id dead ... i have two battery that is fully charger and the phone still not coming up.
Hi all, sorry that im posting after two years ago but i am facing exactly the same problem, but i plugged it in my USB port, wich i think its a usb2, and i got the screen on but the cellphone did not say charging instead of that was connect your charger, and it was lower than 3% then it turned off. What can it be a solution??
None of the avobe solutions worked?
Which rom/kernel are you using?
I too have this same issue. My Atrix won't come on. I have 2 of the same phone. I tried the charger and cable from both phones. Neither work. When I first plug it it, the green light comes on for a few seconds then it goes out. I even opened the phone and removed the battery. Used a voltage tested and found my battery has 3.7 volts. Thats almost 100% charge. So it not a problem of power. I plugged the phone to my computer and same green light for a few seconds then gone. Won't do anything. No battery display or anything. I even did the simulated battery removal procedure. Didn't work. Is there anything else I can try? Can't get to recovery mode without display unless someone has a fix for that?

[Q] Not charging? :S

Hmmm, this is a weird one guys.
I can charge my X10 only if it is plugged in to the USB port via the computer. However, when it is plugged directly into the power socket, it does not charge. Now, I've tried two different chargers, and both work when charging another device (my iPod Touch).
I don't understand. The cord can't be broken, since it works when charging from my computer? Yet, the charger (the thing that plugs into the wall) can't be broken either, since another charger didn't work and also both have the ability to charge my iPod.
What's up? :S
Thanks in advance.
NOTE: Even when charging while off works on the computer, just not when it's plugged in (and I am not using a custom kernel either). I doubt the ROM matters (since it still has the above problem while charging when off), but even so, I'm using v061 of Wolfbreak's 6.1.3 ROM.
Bump bump, bump it up!
Do you use the original SE in-wall charger? If not, thats the problem, if yes I recomend to test with a different wall charger (eg. from another device)
May be the cable it faulty? Because the PC charging uses a less amount of Volts (to my knowledge) and the charging while connected to PC is very slow. Did you try with any other Official cable?
It could possibly be your cable as mine broke a few weeks back (Same Problem), I just replaced the cable now its fine
Guys :-/
Went out and bought a new cable, and still not charging from the power Only from the slower laptop USB port :'(
I think it may be the X10 itself..
I am still suffering from this problem And sometimes when it's connected to the PC and displays 'charging', it instead discharges
Mayazcherquoi said:
I am still suffering from this problem And sometimes when it's connected to the PC and displays 'charging', it instead discharges
Click to expand...
Click to collapse
Maybe the connector in the phone is broken????
Yep your usb port is broken, mine did exactly the same thing. You will have to send it to fonebiz in rockdale, nsw. I just got my phone back, took 6 weeks to repair!
blade828 said:
Yep your usb port is broken, mine did exactly the same thing. You will have to send it to fonebiz in rockdale, nsw. I just got my phone back, took 6 weeks to repair!
Click to expand...
Click to collapse
Rockdale? 6 weeks?! Not going that far. :-/ I can live with just charging from the PC at the moment.
Thanks though Sad news indeed
Is is still under warranty? It will eventually stop charging from the PC too. I was waiting for parts to arrive so maybe they have them in stock now. That was 6 weeks from melbourne and back.
Going through the same thing in the US. I was told repair would be 5-7 days, but I'm sure I'm looking longer. If it comes back within the time frame they gave me I will be pleasantly surprised. I hope you're still under warranty and do your self the favor and send it in or soon you will have a very expensive paper weight. Good Luck!
I went through the exaxt same thing. It stopped charging from the wall but could only charge from computer but eventually stopped charging altogether.
Did you try taking out the battery and plugging in with the original se microusb cabe to the wall. After 5 min. put the battery in. First time didnt work for me but then i took out the battery again and put it back in immediately and then it turned on.
try getting a usb-to-wall charger, and plugging your computer usb cable into wall.
Sent from my X10 TripNMiUI using XDA Premium App
Out of curiosity, how long before each of your X10's stopped charging altogether? :S
Because, for me, it's been longer than two months and throughout that time I've managed to keep charging it via the computer.
Thanks.
Mayazcherquoi said:
Hmmm, this is a weird one guys.
I can charge my X10 only if it is plugged in to the USB port via the computer. However, when it is plugged directly into the power socket, it does not charge. Now, I've tried two different chargers, and both work when charging another device (my iPod Touch).
I don't understand. The cord can't be broken, since it works when charging from my computer? Yet, the charger (the thing that plugs into the wall) can't be broken either, since another charger didn't work and also both have the ability to charge my iPod.
What's up? :S
Thanks in advance.
NOTE: Even when charging while off works on the computer, just not when it's plugged in (and I am not using a custom kernel either). I doubt the ROM matters (since it still has the above problem while charging when off), but even so, I'm using v061 of Wolfbreak's 6.1.3 ROM.
Click to expand...
Click to collapse
I've 3 usb-to- chargers here:
From a MP20 phone, generic charger that can't charge my phone and also can't charge most of other devices, output power and voltage are low.
From an old Ipaq(not ipad) it does charge my x10 for some reason takes longer than the original, it says on it 1000mA and 5V, I don't remember the real amp and voltage on it.
And the original one, always charge really fast(2 hours for a full 0 to 100% when the phone is ON)
Conclusion, buy and original charger if you not using one, which seems to be the case.
OR, update your baseband if possible, as battery issues are normally related to baseband are normally the cause of this errors.
To make sure you can always try to do a SEUS repair.
Neo said:
May be the cable it faulty? Because the PC charging uses a less amount of Volts (to my knowledge) and the charging while connected to PC is very slow. Did you try with any other Official cable?
Click to expand...
Click to collapse
Sorry to say this, but your are wrong man.
My charger says 5.0V which is exact the same voltage as any USB ports(exception for some internal USB ports used commonly for bluetooth and other low consumption devices that use 3.0 to 3.3V).
The difference is mainly on the amount of power amp it can supply, the original usb cable + wall charger provides 700mA, while in the PC USB 2.0 ports provide 500mA, 1.0 USB provide 100mA and 1.1 I don't remember now, generic usb wall chargers say sometimes they provide 500mA but they mostly provide 30l0mA and sometimes they do not provide on 5.0V they oscillate between 4.6 to 5.2V a good usb port have to provide 4.95V to 5.1V any difference from this may even burn a phone if higher and not charge or reduce a battery life if too lower.
Everytime a battery is not charged up the end of 100% they battery life gets a bit reduce as next time even if you leave it to charge up to 100% it won't really be at 100%, this can only be seen by measuring the battery voltage after the charge, fully charge it must reach up to 4.7V
on the battery or something like this.
Mayazcherquoi said:
Guys :-/
Went out and bought a new cable, and still not charging from the power Only from the slower laptop USB port :'(
I think it may be the X10 itself..
Click to expand...
Click to collapse
If the cable is too thin(like 1.0 usb cables they can't handle 500mA if connected to an already extended usb port it may not get recognized and also not even charge.
Laptops usb ports may not allow 500mA it different for every laptop, some work, some doesn't and others your have to set that on bios.
Mayazcherquoi said:
I am still suffering from this problem And sometimes when it's connected to the PC and displays 'charging', it instead discharges
Click to expand...
Click to collapse
Always when connected to the PC it should say charging, if it did say discharging at some point then there was something wrong.
But charging on the pc is very slow and not good.
denenatse said:
try getting a usb-to-wall charger, and plugging your computer usb cable into wall.
Sent from my X10 TripNMiUI using XDA Premium App
Click to expand...
Click to collapse
Is there any other model of charger than a usb-to-wall? Sorry my lack of knowledge on this, but i never saw a wall direct charger for x10.
Thanks button is appreciated, rsrsrs

Insanely Slowing Charging when connected to Computer USB Port?

For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
panamaniac said:
Mine charged super slowly on USB as well, using the stock charger. I hadn't yet plugged it into the wall so I wasn't "used to" faster charging yet. That said I'd have to do a side-by-side with my G3 to really see.
Click to expand...
Click to collapse
You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
UnderTheAir said:
You mean the stock cable? This is just a problem with the pc usb port. Wall charging is fine.
Click to expand...
Click to collapse
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
panamaniac said:
I mean the stock cable using a usb port on my macbook pro, yeah—same issue as yours, no?
Click to expand...
Click to collapse
Yea was just a bit confused since you said stock "charger". Don't know why this is happening.
A quick google didn't reveal anything about QC 2.0 charging slower on computers than regular chargers. Since you have the stock cable too, have you compared those two to see if your amazon cable is the culprit?
UnderTheAir said:
For the few days I've had my G5 I've noticed that this phone charges extremely slow when connected to a computers USB Port. Now I'm not stupid, and I realize that USB ports don't draw that much power at all. The reason Im concerned is that my old G2 on the exact same PC USB port probably charges almost twice as fast at least. Anyone know what might be going on? The cable should be fine, I'm using this: http://www.amazon.com/Cable-TechMatte-USB-C-Nexus-Black/dp/B01706YAXY . Thanks in advance.
Click to expand...
Click to collapse
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Fadman37 said:
Can you download the app Ampre and tell me what the charge rate is? mine is fluctuating between 50mA to 740mA while plugged in to a SS (SuperSpeed) USB and max of 200mA while plugged into a regular USB. This a very good app to determine the quality of a wall charger. It will give you the Max USB current that the phone detects. I'm using original cord with phone.
Click to expand...
Click to collapse
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
UnderTheAir said:
Seems weird. Getting anywhere between 10mA and 210mA with a Max USB Current of 500mA.
Click to expand...
Click to collapse
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Fadman37 said:
I don't think its that wired if your plugged into a regular usb and not the superspeed USB.
Click to expand...
Click to collapse
When I get home Ill Ampere my other phone too. And see what the difference is.
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
jrwingate6 said:
There probably isn't a problem at all. The reason it seems your G2 charged faster is because it's battery is smaller than the one in your G5.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
UnderTheAir said:
But it's not. The G2 had a 3000maH battery. The G5 has a 2800.
Click to expand...
Click to collapse
Wow....seriously? That's odd.
I charged mine for a bit today off a MacBook Pro (retina) and of course, it was slower than the wall charger and reported as charging "slowly" but the % it was increasing by was as I would expect and similar to that of the Nexus 5X. This was with the screen off. Did you have your screen on at all while charging? One thing I noticed with the 5X was that if you're using the phone or just have the screen on then the mA that the phone pulls from a computer USB massively dropped for some reason.
I guess the screen was on for some of the time. But there were whole hours where it wasn't. It think it was probably on plugged into the computer for like 3 hours, and got maybe 15% tops.
I used Ampere to check this against my G2 at home. Both were pulling the same amount, somewhere around 150-200 on average. Don't know, maybe its all in my head, but 3Hrs for 15% seems super slow even for a pc usb 2.0 port.
Yes that is normal
USB tops out at 500mah while 3.0 USB tops pit at 800mah I think
Could it be a false positive? You know that some devices report different charges... My old device had 100% show until it hit 95, then after it would stabilize. Charging could be the same. A lot of devices report charges at different rates at different parts of the battery... Regardless, usb charging has always been slow. It also depends if it's purely charging or also allowed to connect and sync. Then there is a difference as well... Many many factors to look into, honestly.
Sent from my SM-G935F using Tapatalk
Most laptops will only out out 0.5a per pair of ports. Desktop can put out more of course. Compare that to your included charger with 1.8a, or a normal 1a charger, big difference. And if you have the phone awake, it pretty much isn't going to go up lol
Sent from my LGLS992 using XDA-Developers mobile app
For what it's worth my s7e charges very slow via usb to computer.
Sent from my iPhone using Tapatalk

Tweaking device charging power management

Hi guys!
My phone (Sony XPERIA Z3 Dual running LineageOS 18.1) has a problem when it's connected to charger and is doing heavy tasks.
I know it's not good to use phone while charging, but there are times that i'm not around my pc and want to use my phone instead, the bigger problem is, when my phone has low battery percentage and i need to keep using it. but the battery still discharges even when i connect it to a charger with a higher current (+500mAh more than the phone's own charger) then eventually shuts down
i heard smartphones draw a predefined amount of power from chargers.
Now i'm looking for a way to tweak the system to force my phone draw more current from those faster chargers to stop discharging while i'm using it.
as always, when i search the google the only things i find are a bunch of stupid articles which suggest turn of your phone while charging or put it on airplane mode, etc.
is there any way or any app that does these modifications on devices? or even make my phone use the charger's power as the primary power source?
Sure, your "chain of charge" works as intended?
https://forum.xda-developers.com/t/q-is-sony-z3-quick-charge-2-0-compatible.3005538/
https://en.wikipedia.org/wiki/Quick_Charge
I have several devices and several chargers (and several cables)... and it does not always make sense what charger/cable works with what device My rule of thumb: Newer chargers like with QC4 (which usually support previous charging protocols as well) support more devices but sometimes it's just best with its original charger.
SigmundDroid said:
Sure, your "chain of charge" works as intended?
https://forum.xda-developers.com/t/q-is-sony-z3-quick-charge-2-0-compatible.3005538/
https://en.wikipedia.org/wiki/Quick_Charge
I have several devices and several chargers (and several cables)... and it does not always make sense what charger/cable works with what device My rule of thumb: Newer chargers like with QC4 (which usually support previous charging protocols as well) support more devices but sometimes it's just best with its original charger.
Click to expand...
Click to collapse
Thanks for your help, but i don't think fast charging technologies can be a satisfying solution since they don't charge the phones from 0 to 100 with same speed and after some time or some percentage their speed fallback to normal (according to what i heard) also those specific chargers are nowhere to be found and if i find one in my country, it will be too expensive for me.
btw, i can't understand what you mean by "chain of charge", sorry
TheShadowOfAGhost20 said:
chain of charge
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Click to collapse
I should have been more obvious
Charger <---> Cable <---> (Adapter) <---> Device
Sometimes I make assumptions how quick a certain combination will charge... Well, I am almost never right
TheShadowOfAGhost20 said:
don't think fast charging technologies can be a satisfying solution
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Click to collapse
Yes, would have agreed a year ago... but it seems to work better and better. Indeed, those chargers can be really expensive (was just lucky to get a QC3 from Baseus with 30W for 13€ recently).
SigmundDroid said:
Charger <---> Cable <---> (Adapter) <---> Device
Click to expand...
Click to collapse
Thanks bro, now i almost get it
Well, i have a little doubt regarding my phone's power management, most of the time if i use my phone while charging and then leave it at idle, the amount of current it receives won't return to the same amount it was before tasks, it shows "charging slowly" in the battery settings, so i have to disconnect and reconnect my phone to the charger in order to fix it.
SigmundDroid said:
Sometimes I make assumptions how quick a certain combination will charge... Well, I am almost never right
Click to expand...
Click to collapse
Well, chargers are different, i had a 1.5mAh Sony charger and used it when i had an Xperia SL (whose charger was 850mAh) it charged my phone so fast but it always got so hot, now that charger works normally with my current phone. cables are OK if they are OEM ones. my chargers and cables are both OK, i don't think there is anything wrong with them.

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