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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19 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 ...
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1answer
26 views

All apps deleted

Please help, I was trying to power on my Android phone, it took longer time than usual but when it eventually Powers on all my third party apps had been deleted but my files are still intact, what ...
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Why does my phone battery die at 0% then it has more battery when I turn it on again?

So after dying at 0% when I turn it on again, it can have more battery like 26%. Why does this happen? Does this mean my phone has a virus?
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What to do if my Samsung Tablet keeps restarting

My Samsung S5e Tablet keeps restarting almost every few minutes if I use it or not I have sent it in for repairs but when I got it back It still keeps restarting its just been over a year since I got ...
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16 views

Reading battery level/voltage via USB port

I'm interested in creating a device that needs to externally monitor the battery level or voltage of the phone via the USB port. I haven't had much experience with the inner workings of Android, but I ...
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22 views

Do Android “charge and use kits” exist?

I have successfully Twitch streamed out from my cell phone. Why a cell phone?; It has WAY better internet speed than my home connection,(10M out for cell vs 400k for home) and the bandwidth is not ...
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20 views

Suppress “battery charged, unplug” notification in Android 9

There are some older questions about this (2013 for 4.0: How do I get rid of the "Battery fully charged, unplug charger" popup screen? ; and 2010 with a 2016 answer: How to disable battery ...
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34 views

Samsung Tab E keep turn on automatically

i have a Samsung Tab E SM-T561 and every time i turn it off after 2/3 seconds its turning on on its own. I already tried this: Hard Reset (several times) Battery replacement I noticed that if i ...
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1answer
142 views

OnePlus 8T battery capacity

Using the AccuBattery app I'm told that the design capacity of the battery is 4500 mAh, but after 3 significant charging sessions the current capacity is 2095 and has never reached 50% of the design ...
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25 views

How to keep running Android tablet with dead battery

I‘m using Android Galaxy View tablet as photo-frame, integrated in the wall with AC adapter connected constantly 24/7. The problem is the battery inside tabled dies each year. And when the battery is ...
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Is it possible to keep the user data with a smartphone that boots to the data wipe menu?

My smartphone turns on without passing the OS loading screen, then loads the recovery menu (Redmi-Recovery 3.0). I can't turn off the device, I tried waiting for the battery to run off, charge it and ...
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47 views

Screen on when charging on powered off phone

The issue My phone's screen is always on when I charge it while it is turned off. It displays this image: And the screen cannot be turned off. I believe it is not charging either, but I can boot it ...
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1answer
25 views

What is this symbol on the battery? [closed]

What does this mean? It is one of the many symbols and logos on a phone battery. I know it's not technically an Android question, but at least it's related, and I couldn't find a more suitable ...
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25 views

ADB Wifi loses connection when device's screen turns off - Realme 7 - Android 10

I work on Android Studio while using actual device for ADB using ADB over tcp/ip through command prompt (no additional software). But, this new device gets offline the moment screen turns off. I've ...
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What does “REMOVE ACCOUNT” in “Users & accounts” do when it comes to fixing the FAQ WhatsApp problem “Seeing numbers instead of contacts’ names”?

On Sunday, 13th September 2020, the battery of my Motorola Moto G5 broke down and I ordered a new one. Yesterday, on Friday, 18th September 2020, it finally arrived and everything worked just fine. ...
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1answer
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Telegram does not recognise account after being offline for almost a week due to battery failure

On Sunday, 13th September 2020, the battery of my Motorola Moto G5 broke down and I ordered a new one. Today, on Friday, 18th September 2020, it finally arrived and it works just fine. Several errors, ...
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23 views

Battery Voltage and Percentage

I have recently bought a battery replacement, and not happy with the performance I have been monitoring its levels. I have obtained this graph, and one thing that surprises me is that the voltage ...
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25 views

Is this “app” malicious or is it a bug? [duplicate]

I was examining my battery usage and noticed this: I don't know what this "-5" app is supposed to be. Could it be malicious or is it just a bug? I own an OnePlus 6 with Android 10 (OxygenOS ...
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27 views

Android battery usage for a specific app

Recently, I developed a mobile application which significantly consumes the smartphone battery due to some of the functions of the application. I want to have a precise measurement about the battery ...
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1answer
36 views

What can I do to slow down battery degradation of portable power bank for my Android phone?

I just got Inland USB-A 5,200mAh Power Bank w/ LED Indicators for my android phone. It has a one-year warrantee, which seems to tell that its battery might degrade significantly after one year of ...
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36 views

How to enable High power consumption setting in Vivo Y50

I want to programmatically enable the High background power consumption setting for an app. Adding it to deviceidle whitelist is not working. I tried this adb shell dumpsys deviceidle whitelist +com....
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1answer
82 views

Help diagnosing constant CPU usage of phone during sleep (Battery Historian Chart)

I saw a great Battery Historian guide and decided to try it out. I noticed that last night while my phone was unplugged, the "CPU Running" bar was active the whole time when I was asleep. ...
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1answer
24 views

Reviving my phone after a small part of it (eg the processor) overheated

I tried to compress my 1.6GB video in the Media Converter app by exporting it to mp4(h264,aac) on my OnePlus 3 as per https://www.quora.com/How-do-I-reduce-video-size-on-Android. However, ...
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23 views

Smartphone not charging when turned On

Smartphone: Xiaomi Redmi Note 7s I have been charging it with Pixel XL's charger for 4 months. It stopped getting charged while turned on yesterday. If I turn off the device then it will take ...
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Xiaomi Redmi 5 Whyred turns itself off

My Xiaomi Redmi 5 Whyred started shutting down randomly - rarely enough to make is hard to reproduce. So far happened once during a day and every 2nd night. I am using a Havoc-OS 2.9 (Based on ...
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44 views

LG G5 stuck with screen showing a picture as if the battery is not attached

My LG G5 is stuck with a screen showing a picture as if the battery is not attached. I don't know what is the reason. If I remove the battery for a while and reattach it, it works. I tried to search ...
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32 views

automatically power on android when charge is 20% or 10%

I know its duplicate on Power on when charging but only when battery level is greater than 20% but it seems that question has no answer and also android version has changes a lot , I am on Android 10 ,...
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13 views

What shall I do if I damage battery?

I've been disassembling phone - Xiaomi Mi 5X/A1, in order to change crashed screen. However, while I was trying to remove battery, I probably cut battery cover, so I can see white slices and sharp ...
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37 views

How would one simulate a charging experience on a real android device?

I possess a Samsung Galaxy S8 with Samsung Global Goals installed. The app allows you to donate based on ads viewed during the time the device is charging. Would be possible to essentially 'fake' the ...
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205 views

Android control battery charge programmatically

I'am using a Linage Android image (rooted) to control the battery charge and discharge with the commands: Charge: echo 0 > /sys/class/power_supply/battery/batt_slate_mode Stop charging: echo 1 >...
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38 views

High battery usage (no wifi no apps no wireless)?

I've noticed that I lose about 20% battery each hour while my phone is unattended and offline. I check the battery settings and find that no apps are running. The phone is rooted, and I'm wondering ...
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1answer
59 views

How does Battery Management System work (at the hardware-interface level) ? And how is idle self-discharging of batteries handled?

I came across the following when I was reading up about fully drained batteries in phones: If the phone is OFF for a month, then it is probable that the battery has gone down to a point that the BMS ...
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2answers
562 views

How do I change the Battery Percentage that corresponds to a Voltage in Android

My original Li-ion has 3000 mAh capacity. I've modded my device to have a total of 7000 mAh capacity now. The enhanced capacity means that my percentage is not displayed accurately anymore. About ...
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32 views

Phone overheats after powering on

I've seen this with plenty of smartphones,usually after 1-2 years of use.The phone overheats for a minute or 2 before cooling down,but it's performance doesn't differ from a non-overheating phone that ...
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44 views

Battery drained

Since 2 days ago my phone can not last more than 12 hours in airplane mode. The battery is drained by something. adb shell top shows that system_server is using 100% of CPU. adb logcat | grep 1577 (...
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1answer
39 views

Is it possible to determine whether a purchased phone has a new battery?

I recently purchased a Samsung phone that was listed as "factory refurbished". Something I found on Samsung's website says that factory refurbished phones will have a new battery installed. However, ...
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35 views

Getting data of phone with dead battery

I have to get data off an old Zuk Z2 Plus that was working when it got replaced by a new phone and left lieing around for a year or so. Now it does not boot any more. When I plug in power, the screen ...
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21 views

Can I preserve phone battery remotely?

I lost my phone and connected it to my computer via Google account so I can check it's location, commend it to beep, etc. However, I will be able to retrieve it only tomorrow and by then it will ...
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1answer
79 views

Why does the phone shutdown and battery drains super fast on 20% or less capacity when taking pictures?

When the phone is 20%ish or lower battery, after taking pictures the os shuts down. I have observed this behavior on 5 different brands (lg, samsung, lenovo, xiaomi, oneplus), across different ...
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137 views

My LG G5 battery is stuck inside the device and I have a frozen 'Firmware Update' screen. Please help

My LG G5 phone is stuck on a screen saying 'Firmware Update'. It has been at 0 percent for hours now and there is a code that says 633A B50. I would have tried to remove the battery, but the bottom ...
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1answer
4k 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....
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33 views

Sony Xperia XA1, overcharing battery damage?

My cell phone is a Sony Xperia XA1 and it has Android 8.0.0 I think that when I got the phone the manual might have said that the phone has built-in protection from overcharging. But I am not sure. ...
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1answer
49 views

Is it a bad idea to let your phone keep charging all the time?

I read somewhere that long periods of charging can be bad for the battery and the best level to keep your battery at is around 50%. Is this true? If it is then after how long will the battery show ...
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1answer
49 views

Android battery pinout

I have an Lollipop EDC. That Android has battery with 6 pinouts. How to get information about battery pin-out via ADB?
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1k views

Huawei P30 Pro I can't set sleep mode to never

I just got my new Huawei P30 Pro and I am not able to set sleep mode to never. Maximum option available is 10 minutes. My battery mode is correct and it is set to "highest performance" so without any ...
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2answers
224 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 ...
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1answer
121 views

Process “irq/288-wcd9xxx” draining battery, how to stop it?

I'm using a Fairphone 2 with Fairphone open OS, under Android 7, (build-number: fp2_sibon-userdebug 7.1.2 19.11.2 sibon-24df0be9), up to date. My battery loses systematically 50% to 90% overnight, and ...
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1k views

Is it possible to boot a Android smartphone without battery with charging wire on?

Problem The title of this post seems a funny challenge. But frankly, there are a lot of worthy points involved in this question. If a Android phone support rapid charging. If its battery is removed, ...
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40 views

Samsung Tab A6 won't leave battery screen or turn on

I'm currently having issues turn my A6 on, in that it simply won't start up. I have tried: Holding the Power and Volume Down button, Holding the Power button for 30 secs, changing cables, changing ...
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115 views

How to get the battery status from an Android phone with Python connected to a PC via Bluetooth?

Is there a way to interrogate an Android phone with Python on a PC and/or Linux to get battery status while connected via Bluetooth?

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