Questions tagged [battery]

For questions related to batteries on Android devices. Questions about battery life should be tagged with [battery-life]

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13 views

What just sucked all of my battery?

I got 100% of battery when going asleep. When waking up, it was 23%. I checked the battery usage, but only thing I saw was that "Google" used 10% during that time. What the heck is going on ...
0 votes
0 answers
25 views

Android Battery Report

Is the Android OS battery breakdown not an exhaustive list of battery drain sources? I find that it never adds up. One time, after not restarting the phone for a month, the battery started to drain ...
31 votes
1 answer
10k views

Don't charge the battery but use connected power to run the phone

Answers to this question Is power consumed from battery to run the phone when charging? explain how charging while phone is in use does both - charging the battery and powering the on going activities....
7 votes
6 answers
34k views

my battery charge indicator is continually flashing on and off

My battery charge indicator (the screen info saying % full), flashes on/off/on/off, etc. sometimes. I've switched the battery to a spare to see if that helps but it didn't. When it does happen, ...
1 vote
0 answers
62 views

dumpsys battery in Termux

I am trying to get battery info in Termux. I granted android.permission.DUMP and android.permission.PACKAGE_USAGE_STATS via ADB for com.termux (Termux app) Then I opened Termux and types in /system/...
0 votes
0 answers
13 views

tablet doesn't turn on, does it need a backup battery?

I would like to know if the tablet needs a backup battery to start (the device does not turn on anymore) It is an old device. thanks in advance
1 vote
1 answer
41 views

New battery results in strange behavior

I was having the impression that my phone (Pixel 4) battery is already low on capacity (and a battery monitor calculated a capacity of 61%) so I ordered a new one and followed a tutorial on how to ...
0 votes
0 answers
30 views

My android phone drains from 100 percent to 0 percent in 20 minutes

I have been using my laptop to charge my android phone until recently when I noticed the back lid pushed to the back slightly and then the battery drains from 100 percent to 0 percent in 20 minutes. I ...
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0 answers
22 views

Is it best to charge battery only after completely discharging it? [duplicate]

Is it best, for battery life, to charge it only after completely discharging it?
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0 answers
36 views

How can I stop Android putting an app in Battery Optimization mode?

I have an app (Calendar Alarm) that gives me an an alarm when an appointment is about to start. I have put this app into "non-battery optimization" mode several times now. After I do this it ...
1 vote
0 answers
35 views

Battery low triggering by ringtones and voice in Android phones

Is it technically feasible to have this feature of Battery low triggering by ringtones and voice to the end user say when battery has reached level of 10% or 5% in android os phone devices? This ...
0 votes
0 answers
138 views

Does using two SIM cards in a smartphone drain the battery more?

Does using two SIM cards in a smartphone drain the battery more? If yes, what does the phone do differently to cause a higher energy consumption? If take out one SIM card, is it true that the phone ...
1 vote
0 answers
84 views

Is it possible to infer ambient temperature from battery temperature?

A few questions here and at Stack Overflow make battery temperature available for the inquiring minds: Get temperature of battery on Android How does Android obtain battery temperature Yet, I'm ...
2 votes
0 answers
29 views

Does having more widgets/things on screen when the screen is off or on use up more battery than if there was less?

Let's say you had a timer widget that was counting down time. If you turn off the screen, would the widget be taking up more battery than if it wasn't on screen and was just in the background counting ...
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0 answers
22 views

Samsung A33: Battery Discharge to 0 when Headphone Adapter was left plugged in overnight

After listening to music in bed, I closed all running apps on my Samsung A33, and forgot to remove the Headphone adapter (USB C to headphone jack from Apple), the battery was completely discharged ...
0 votes
0 answers
215 views

Query battery cycles count on Samsung running Android 12

How can I read the battery charging cycles on a Samsung running Android 12? With the apps in the Play Store, I didn't find out anything. I also have access to a laptop with Windows 10 and a USB cable ...
0 votes
0 answers
29 views

Phone battery rapidly discharges after reboot

So, what happens is this: I turn my phone off for the night. The next morning I start it up again, and it's still the at the same percentage. But then, within minutes, it will suddenly start ...
0 votes
0 answers
20 views

How would you verify Android battery stats apps?

This is more a question about diagnosing battery and battery hardware, than it is specifically about Android. If there is a better StackExchange site for this question to belong to, please tell me, I ...
1 vote
2 answers
4k views

Asus Transformer slow charge

My ASUS Transformer TF101 charges extremely slowly using the original power adapter. I'm trying to figure out the cause. Here are all my knowns: The power block (wall to USB adapter) charges my ...
0 votes
0 answers
10 views

wired app showing in battery usage [duplicate]

When I checked my parents phone last night I noticed a wired app that I've never seen appear in the battery usage..... Had the android robot with -5 under it. When I click on where States open th app ...
0 votes
0 answers
31 views

My phone is receiving ~1700mA but it's slow at charging

I have 2 Xiaomi phones that both have 18W fast-charging and receive around 1700mA while charging, but one of them takes a long time to charge (even if i change the USB cable). How does that make any ...
0 votes
1 answer
38 views

Screen fading and battery icon outlined in red

I've got a new Doogee S40 running Android 9.0. A problem started when the battery level went down to 20%. The battery icon started to be outlined in red and the screen started dimming after around 5 ...
2 votes
0 answers
95 views

How can I extend the length of the batterystats history?

I am doing some power consumption analysis using Batterystats and Battery Historian. The problem that I am facing is that the length of history I can get from the phones varies widely form brand to ...
0 votes
0 answers
64 views

External SSD drive can only be detected when Android is on 100% battery

Android 11 will communicate with the external drive using a -y- connector, one lead to power, and the other lead to PNY 1TB drive. However, once the battery drains below 100 percent, Android refuses ...
0 votes
0 answers
69 views

Does adding multiple user accounts on my android have any adverse impact?

I see Androids provide an option to add multiple user accounts to a phone. This is helpful when I have to lend my phone to family or an acquaintance, or to separate work apps and personal apps. I was ...
0 votes
0 answers
478 views

How To Charge Android Phone In Fastboot (Bootloader) Mode?

My Android Phone Is Not Charging. Bootloader Shows The Warning Battery Low. I Accedentaly Erased /Boot /Recovery /System Partition. And Because Battery Is Low I Can Not Flash Boot.Img And Recovery.Img....
0 votes
0 answers
170 views

Bluetooth battery level not showing up in status bar

I'm using Lineage OS 18.1 and a BLE Mouse that reports its battery level. I can confirm that the battery level is reported correctly, by connecting it with my Linux computer: (See Devices: DIY Page ...
1 vote
1 answer
301 views

How can the battery get discharged while Ampere is showing that it is charging?

How can the battery get discharged while Ampere is showing that it is charging? Example: At 1:06 PM, the battery indicates 2%. At 1:08 PM, the battery indicates 1%, even though Ampere says that the ...
1 vote
1 answer
48 views

Can I read data and IMEI of a phone that can't be powered up?

I have an old Android phone Kyocera Hydro Icon C6730, which is stuck in powering up, while being connected to the power strip. Its battery is also old and I'm not sure if it is still working correctly....
0 votes
0 answers
31 views

how to stop Mobile shutting down on apps using as Battery dropping from 70% to 0% in Android 6.0.1

Question:- how to stop Mobile shutting down on apps using as Battery dropping from 70% to 0% in Android 6.0.1. I have formatted my External micro sd card as internal and automatically while ...
0 votes
0 answers
46 views

How to completely discharge a mobile device?

In case of laptops we should remove battery, then turn it off and hold power button for 15 seconds to completely discharge the motherboard. Whats the procedure in case of a smartphone or a tablet with ...
2 votes
1 answer
106 views

What is meant by "proportional" and "smearing" in batterystats

I want to analyze battery consumption of an app and ran: > adb shell dumpsys batterystats > dump.txt Within the filedump I found the section I am interested in: Estimated power use (mAh): ...
1 vote
2 answers
732 views

How to make an Android smartphone actually go to sleep?

When I turn the screen off on an Android smartphone, I want battery life to be conserved. Thus, I don't want any third-party apps running in the background, and I don't want the device periodically ...
3 votes
1 answer
1k views

Is there any relation between charging rate and discharging rate?

Sometimes when I do not use the original charger but a different one it would take less time to fully charge the device than the original charger would do. But I can feel that discharging rate is ...
0 votes
1 answer
2k views

FTM screen cant remove battery

my phone says FTM it suggests taking the battery out but I cant remove my battery so now what do I do ?
2 votes
1 answer
2k views

Where is the battery animation called?

I have a tablet from China, it's a Q8H Allwinner. It is rooted, and I've browsed the internal storage for hours to find the battery animation, I found them at framework-res.apk... Now I want to find ...
0 votes
0 answers
24 views

white battery/does not turn on/does not charge

I was using a Xiaomi RedMi 9T (lime), nothing unusual. I left the wifi all over the night and the next time checked, MIUI was updated from 10 to 11. But turned off and its looping at the redmi screen,...
1 vote
1 answer
3k views

Phone stuck at 0% battery

I have a Moto G phone. I'm using LineageOS. Yesterday I notice my phone went dead. When I press power button, a white light in the camara flashes three times, which I understand to be no battery. It ...
3 votes
1 answer
10k views

Battery drains when phone is turned off

I have a used Samsung Galaxy S3 Mini GT-I8190. When I shut down the phone the battery still drains. The longer I leave the battery in the shut down phone the more charge it looses. Typically the ...
0 votes
2 answers
2k views

Battery Status problem

I recently updated my Note 8.0 Wifi from 4.1.2 to android 4.4.2, and shortly after that rooted it (But kept the stock 4.4.2, NO custom ROMs or anything...). Of course, as I knew, the battery ...
0 votes
1 answer
2k views

YouTube app holds a long wakelock. What app settings can I change to keep it from doing this?

I am using an HTC Evo 4g with Android 2.3.5 Gingerbread. I'm trying to deal with apps which keep my phone from entering sleep mode, and the YouTube app is a major offender. With downloaded apps, ...
0 votes
1 answer
3k views

Battery Protect Mode: On or Off?

I have a Lenovo Android tablet that I intend to be plugged in 24/7. I have either two options: Battery protect mode OFF: the device will occasionally discharge to 99%, then be charged back to 100%. ...
0 votes
1 answer
37 views

Tablet battery replacement and alloc_device_open fail?

I had to do a battery replacement on an Android 4.x tablet Denver TAC-97032. The battery had been obtained from the manufacturer as aftermarket part; it is however not of the same size as the original ...
9 votes
4 answers
13k views

How to show the battery percentage remaining in numbers?

At the moment Android 2.2 has a pretty incomprehensible icon of a battery that shows remaining strength. Is there a way to switch that to a numeric display (like is available on the iPhone)?
0 votes
4 answers
2k views

S4 Wont turn on unless removing battery then turns off after 2 seconds

So, my Galaxy S4 turned off randomly today during charge. I attempted turning it back on via the power button but it would not respond. Then I tried taking out the battery and replacing it, the ...
0 votes
2 answers
3k views

HTC One (M8) blinking red notification light

So after replacing the battery in my One (M8) with a new one from eBay, the notification light just blinks orange when charging. When swapping back to the battery before replacement, it, at least, ...
0 votes
1 answer
2k views

How to turn off ultra power saving mode that was enabled for Huawei Android while it was on low power?

My Huawei Android was on low power and it proposed to turn on ultra power saving mode. I accepted it. Now I have connected the phone to the charger but I can not enable other power modes. I am going ...
0 votes
1 answer
219 views

Badly swollen Galaxy battery - safe to handle?

I've recently found my old Galaxy S6 in a drawer, where it's been sitting for the last ~1.5 years. In that time, the battery has swollen very badly, pictures below: I need to so something about the ...
1 vote
2 answers
2k views

Battery status stuck at 15% for 2-3 hours, then jumps to 33% after a reboot

I charge my phone running Android 4.1.2 at night, wake up in the morning, pull it off the charger, about 9-10 PM it drops to about 15%. It will sit at 15% for 2-3 hours without losing a single percent,...
6 votes
1 answer
2k views

Download Manager causes high CPU usage on Motorola Razr with stock Android 4.0

My Razr (Stock ROM 4.0) is very very hot. After some research I found com.android.providers.downloads is responsible, since it's using about 60% of CPU. I have tried killing it, and it respawns, ...

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