Develop Bugs

Battery Question

Hey all,
So over the past couple of weeks, my VZW Galaxy Nexus has steadily been decreasing max battery percentage it will charge to. First it wouldn't charge past 89% even sitting over night, and now its down to about 76%. I want to figure out if this could be a software issue before I go buying a new battery.
Thanks for the help,
D1cey

[Q] [Help] Battery Problem in Tab 3 7.0 (SM-T210R)

Hi, i have a problem with my Galaxy my Galaxy Tab 3 7.0, can not remember when it started, but the problem is with the Android battery indicator, this start when i left 40% off remaining battery. Example: im playing a game, stop playing and the battery is at 27%, lock the device or turn off the screen for about 30 or 40 second, i look back and indicates that there is 36% remaining battery.
Sometimes indicates remaining 15%, in 30 second or 1 minute, show 5%, i connect to the charger for about 10 seconds, and show 20%.
I have calibrated several times, change rom several times and in all i have the problem, also i have completely discharge the battery, let it charge all night off, when i turn on is at 100% and back to calibrate, and the problem persist. ( i use battery calibration)
If anyone know how to solve this, or know another form to calibrate the battery, please tell me.
Thanks

I have the same issue, mine takes forever to charge but drains fast then States different levels from high to low. I've used several roms but haven't calibrated yet and will calibrate when I'm fully charged. Since you said you have calibrated already I believe the best thing to do is back up your system into recovery then wipe and reflash the rom you're currently using it might help.
Sent from my SM-T210 using XDA Free mobile app

Battery Meter uncalibrated problem?! Battery charge jumping SMT800

Hey everyone! For some odd reason every time I charge my Tab S, when I charge it up to 97 percent, 1 minute later it would jump to 100%?! But I still get 8+ hours screen on time after unplugging it so I know its not the battery. Could it be the battery meter being uncalibrated or unstable charging voltages? Im using the Samsung charger that came with my device and I own the Galaxy tab s 10.5 WiFi. I am also running cm11 and this problem happens even on stock two ROM. Would love to hear your feedback on this. Thanks!

DUHAsianSKILLZ said:
Hey everyone! For some odd reason every time I charge my Tab S, when I charge it up to 97 percent, 1 minute later it would jump to 100%?! But I still get 8+ hours screen on time after unplugging it so I know its not the battery. Could it be the battery meter being uncalibrated or unstable charging voltages? Im using the Samsung charger that came with my device and I own the Galaxy tab s 10.5 WiFi. I am also running cm11 and this problem happens even on stock two ROM. Would love to hear your feedback on this. Thanks!
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yes sammy 4.4.2 devices have sucky battery calibration
just calibrate it. I happens when using the device while charging. Next time it does that wait for it to shut down then turn it on, do not charge yet until the device has 1% or cannot be turned on. Good luck

Hi. I have galaxy tab s 8.4 lte version. It bootloops non-stop, but ince I connect the charger, bootloop stops and it works normally. I can do the usual stuff I do with my tablet. Once I disocnnect the charger, bootloop starts again. I tried doing factory reset and wiping cache and those sis jot resolve my concern. I brought it to Samsung Service Center and they want me to pay Php12,000 ($300). I don't wanna pay that amount of money because it's like buying a new tablet. Please help! I feel devastated because I use my tablet to read ebooks. Thank you!

Have you tried the standard Android battery re-calibrate.
For anybody reading this going from 100% when charger is connected and straight to 99% when you disconnect it, is supposedly NORMAL from what i have read about how the battery gauge works.
https://www.androidpit.com/how-to-calibrate-the-battery-on-your-android-device
John.

Batttery charge lasts LONGER if charging started from utter drain?

Let me define a few terms first I am going to use.
Utter drain: Tab used till it switches off automatically and has been left unused and uncharged for several days.
Full drain: Tab used till it switches off automatically.
No drain: Tab charged from 1 to 100%.
I have noticed how my tab if I start charging it from utter drain last A LOT longer on the battery charge compared to if I start charging it from a full drain.
Why does this happen? Can it be fixed? If not is it possible to drain the battery of the tab immensely to create the utter drain status artificially?
My tab 7.7 does not have this problem.

Sudden death of Tab 3 8.0

Hi,
I'll have rooted Galaxy tab 3 8.0 and since it's old it has been mostly only on light use with org rom for couple of years now. Org battery was going down, sudden shutdowns on heavy use and didn't have a juice anymore so I decided to order new battery. While I was waithing new battery to arrive I didn't use that tab and I forgot it to a freezing work car with power on so that tab/old battery froze and tab shutdown. Problem is that it won't charge or start anymore with new or with old battery. Not with any button combination or not with any cord or charger or pc, not with cold battery or not with warm battery. I also used multimeter to check that there is enough voltage in new batt to start. It just doesn't do anything. No light, no charging icon on screen, nothing. So is that galaxy tab just froze to death(was max - 10'c) or is there any other ways to try to recalibrate/reset power circuit on tab so it starts to understand again when there's battery or charging cable on? Now it's just stupid thing that doesn't seem to understant that there's battery inside and power cord plugged in.

What if it's not only the battery that got damaged? I bet there's more, that's why new battery does not help.