Develop Bugs

[Q] Strange battery percentage drain in 10 minutes.....wtf

This morning after I got ready I took my phone off the charger (it had been charging all night and was at 100%) and walked upstairs. About 10 minutes later I turned on the phone and it was at 67% and going down. I had flashed a new rom yesterday and as quick as I could I did during the drain I did a NAND restore. Could this have been actual battery drain or is there something wrong with my phone/stats. Could my phone have stopped charging at 50% and then just said it was 100%? What should I do? Is there anyway to avoid this from happening again?! I cant go to work with a battery at 50%! lol

-.- Searching is your friend.
The Evo has never trickle charged properly. Trickle charging is when you hit 100% battery while charging and the phone will continue to keep the battery charging and maintain this 100%. So 100% > 99% > 100%.
The problem is the Evo doesn't do this. Once it hits 100%, it switches to battery. It will run off the battery till it hits about 90% and then charge again. Some even say it will NEVER charge again after it hits 100%. So when you unplug it in the morning, you end up dropping extremely fast from 100% to 90%.
There are kernels in the development section that fix this issue but there are people who say it will break your phone or burn your battery out faster over time. When trickle charging, your phone will get hot as its constantly draining and charging. That can lead to a burned out battery as time goes on or a damaged phone. I personally have three batteries. I still tried to use this and noticed a drastic improvement but my phone was also pretty warm when I picked it up in the morning. Its up to you.
Also you might want to see if you have your 4G radio on. That is probably the only thing I can think of that would drain it that fast. Either that or your GPS is on and theres an app running thats using the GPS receiver.

i'd say a 30% drain in 10 minutes is unnatural. it wouldnt be myns rls4 that you flashed, would it? this is experianced by some as a "first day side effect". just fully drain and fully charge the battery a few times and you will be fine.

It could be that it just needs a couple drains and I don't want to quickly point the finger at an app that you are using. A lot of times if I actually charge my phone it will be on 92% when I wake up. 67% is a stretch unless that was 10 minutes of a game or YouTube..but still. Drain the battery a few times and see what happens.

i was thinking maybe its some kind of battery stats problem? Could that have caused it?

Charging problem! slow or no charge..

ok, over the last week or so ive had this issue, gradually getting worse...
my battery will charge to around 40-45% and then charging will slow right down.
two hours later, it will be on around 50% if im lucky, and about 3 more further hours before i hit 60% (this is some of the time, other times, it just remains on its current charge%)
if i leave it overnight for about 10hours or so, highest it goes to now is about 73%, but this is rare, usually 45-50%ish.
ive tested with htc ac wall charger, htc usb, blackberry charger, car charger and a random microusb wallcharger. all have same issue.
when tested with two friends desire hd's on different days, my battery charged perfectly, and at the normal gradient speed over the % range. and my phone reads it correctly at the 100%-98% when back in my phone after change back.
i thought it was down to my phone, just dont know if its rom or hardware. shud i factory restore, or claim on insurance?
i have another issue here...http://forum.xda-developers.com/showthread.php?p=18480603&posted=1#post18480603
which also applies to the question of restore or insurance...
thanks

What Rom are you using, i am using runny 2.2 only 62% charge in 6 hours
9 hours later on battery only upto 68% i have amazing battery life now

i'm using runny 2.2.....left it on charge for 2 hours with phone on, but wifi and everything off and it had only gone up 2% ! !
Turned phone off and plugged in charger, 30 mins later, only went up 1% ! !
72% charge at this point.
So took it off charge, put it in my pocket, went upstairs to bed, turned it on to set alarm and it said 100% on battery....weird!!
matt

Lol this is an issue with calibration. The battery is charging but the software doesnt report it.
You have to charge the phone for as long as possible so you know it is on 100% whether the software says it or not, go into CWM, wipe the battery stats and then let the battery drain fully until it shuts down by itself. Then plug it in and leave it until you know for certain it is at 100%. If the green light comes on leave it for an additional half an hour. Then it will be fixed.

ive only recently got this handset, as last one was replaced on insurance a month or so ago, and its runuing on stock rom with latest updates....?

CM11 battery issues

running the 2/16 release of CM11, battery meter is acting funky, but battery life seems normal. I have no idea if it started with CM11 install or just out of the blue. couple week ago after 13 hours of running on battery I noticed the meter still said 100%, then about an hour later it said 52%, and 30 seconds later 12%, battery low warning, and 15 seconds later it did a clean power off. plugged in, powered off charging said 9%, and was 52% again in about 30 seconds.
battery still lasts all day, but I have no idea how drained it is until about an hour before it's dead. it also won't actually charge unless the meter says it's below 100%, but plugged in it also doesn't drain it more. using an app to monitor the battery, it rarely shows above 3850mv, and will hover there all day long going up and down 300mV or so, but then late in the day it'll break from 100% around 3700mv and the % starts dropping.
so, what's going on here?

so, left on charger overnight (as I do every night), status app said USB power on but discharging. came to work, plugged it in (as I sometimes do), battery said 100%, again USB power and discharging.
unplugged to go to lunch, 54%. sat down to eat, 65%. few minutes later, 70%. from there it started dropping at a normal rate. used it heavily all through lunch, only went to 58%, and seems to be charging normally now as well. I'm so confused... it's been wrong for at least 2 weeks strait through multiple charges and reboots.

What about 'calibrating' the battery?

if it does it again I'll to find time to drain it and then fully charge it powered off, but with an inaccurate reading of what the charge is it was very difficult to fit that into my schedule.
it seems to have calibrated itself now, as it's been fine all weekend.
so the questions is now: what caused it, and why did it fix itself some weeks later? I certainly didn't do anything anywhere near a calibration cycle.

Battery charge issue...

Phone was at 98% battery. Did a reboot as I do every morning, and when it started up again it showed 91% battery. I know reboots don't take 7% battery, so what gives?

My Pixel 2 XL has been having some battery reporting issues, I noticed that when I took my phone off the charger it would lose 15% very quickly then stabilize. Rebooting would also cause a drop in indicated battery %. That's my guess. Investigating to see if it can be fixed by doing a full charge/discharge cycle.

2ndammendment said:
My Pixel 2 XL has been having some battery reporting issues, I noticed that when I took my phone off the charger it would lose 15% very quickly then stabilize. Rebooting would also cause a drop in indicated battery %. That's my guess. Investigating to see if it can be fixed by doing a full charge/discharge cycle.
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I've also been seeing this issue! I will also be letting it do a full cycle today to see if it helps since it only started a few days ago.

My battery seems to be okay but my charge port when I place the cable in it doesn't feel like it fits snugly it almost has a slight wobble to it. Have you guys been noticing that as well?

I've actually been experiencing this as well for a week, I called up Verizon and they shipped me a new phone. So far no charge issue anymore on this one.

I have experienced this too

Tested this again this morning. Had the phone charging overnight.
Unplugged it, it showed 100% battery.
Immediately rebooted, and it dropped to 96%.

With a lot of phones, battery stats reset on reboot. Also- the percentage isn't a perfect science. Just let the phone do its thing. Run the battery down and recharge it. No need to reboot the thing every day.
The battery has been great for me. I use my phone extensively throughout the day, maybe 3-5 hours on time, I always make a day of use without needing to plug in. I had a light use day yesterday, and had 30% left @ 11pm, after pulling off charge the night before @ 11:30pm.

Pleased to announce that (in my case at least) doing a full cycle reset the fuel gauge and it is now working properly. I've never seen a device come with a miscalibrated fuel gauge from the factory, so that was odd. I usually keep my li-ion powered devices between 80% and 30% SoC(state of charge) to reduce cell degradation so we'll see if the fuel gauge becomes uncalibrated over time (which would be somewhat unusual) or if this was simply a software fluke.

Yea I have noticed that in my case, my phone says 100% on the charger so I will restart the phone while still plugged up and once it's booted back up it says 98% so it lost 2% while hooked up to the charger lol. Doesn't seem to affect the battery life. I'm still able to get 5 hrs of screen on time but I will try to kill it completely and charge fully today and see if it fixes it.
This morning I didn't do the restart and didn't use the phone or even turn my screen on and within fifteen minutes I turned it on to 98 % remaining.

Is this battery behavior normal?

I've noticed that my 2 XL battery drains very fast after full charge, but then settles to acceptable drain rates from about 90%. I'd say it takes less than an hour to drop from 100 to 90% without basically any use. Often I can't even hit 100% when charging. More like 99/98% max. If it does charge to 100%, it stays there for a couple minutes tops, even if just on standby. Which leads me to my next issue...
This prompted me to calibrate my battery which seemed to help somewhat, but I found that I cannot monitor the charge rate when charging while the device is turned off. What is shown is just what "looks like" a full battery charged icon at all times, and the screen does not dim at any point during charge. It actually seems that the phone is frozen during charging when turned off, and needs a very long power button press to turn the phone on. I actually have two Pixel 2 XLs in front of me and they both do this! Is this a known issue?
In general I am getting 5-6 hours screen-on time per charge which seems about right from what I've read. But that initial fast drain and "freezing" while charging when turned off is puzzling. Any common experiences or insight?

nobaddreams said:
I've noticed that my 2 XL battery drains very fast after full charge, but then settles to acceptable drain rates from about 90%. I'd say it takes less than an hour to drop from 100 to 90% without basically any use. Often I can't even hit 100% when charging. More like 99/98% max. If it does charge to 100%, it stays there for a couple minutes tops, even if just on standby. Which leads me to my next issue...
This prompted me to calibrate my battery which seemed to help somewhat, but I found that I cannot monitor the charge rate when charging while the device is turned off. What is shown is just what "looks like" a full battery charged icon at all times, and the screen does not dim at any point during charge. It actually seems that the phone is frozen during charging when turned off, and needs a very long power button press to turn the phone on. I actually have two Pixel 2 XLs in front of me and they both do this! Is this a known issue?
In general I am getting 5-6 hours screen-on time per charge which seems about right from what I've read. But that initial fast drain and "freezing" while charging when turned off is puzzling. Any common experiences or insight?
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It may be that the battery is not fully charged when the phone is telling you it is 100%. When using Accubattery to manually benchmark the battery, I found that my phones were still taking a low charge current (as measured by AB) for 45 minutes to sometimes even one hour after the phone was reading 100%. AB will register 100% when the phone's charging circuit cuts off to zero (and notify you). Using AB for a while will also give you a very close approximation of the remaining capacity of your battery relative to a new battery. When my 2XL was new, I was getting just over 100% (~103%). A year later, it is in the high 90's.

Thanks for the tip on Accubattery. I am going to give that a try for a while. So have you been charging up to 100% regularly in spite of what's recommended by this app?

nobaddreams said:
Thanks for the tip on Accubattery. I am going to give that a try for a while. So have you been charging up to 100% regularly in spite of what's recommended by this app?
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Yes, I turn the 80% alarm crap off and leave it on the charger all night. It is fully charged before I go to bed but I leave it on the charger all night. I use AB for bench marking my battery's capacity and it's real good at that... if you start from when AB says your battery is full. You will see it converge to a % capacity after only 2-3 full discharges. I'm just guessing but I think you are not completely filling the battery to it's full capacity. At least using AB for a while will a) provide you with your battery's true capacity wrt a new battery, and b) will rule out you not charging up fully as your mystery 100-90% quick-drop. Please do report back. :good: