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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9
votes
2answers
13k views

What is the difference between the Android OS and Android System?

When I open my Battery Usage, there are two components enlisted as Android OS and Android System. What is the difference between these two?
9
votes
1answer
18k views

Is there an efficient way to calibrate the battery than using some apps?

Is there an efficient way to calibrate the battery of my tablet in order to prove or disprove the very low battery backup than using some Apps.? The context is that my tablet is giving a very low ...
8
votes
2answers
12k views

Bought a new battery, do I need to calibrate it?

My original battery is bloated and is dying quickly after a full charge so I now bought a replacement. Do I need to calibrate this new battery using a calibration app?
8
votes
3answers
2k views

Is it possible to change the background automatically when charging battery?

This is a feature of older nokias, I would like to have it on android! On a related note, it would be nice to have a different background when silenced or on airplane mode.
8
votes
3answers
695 views

Is there a way to tell when the battery is actually at 100%

I recently acquired an HTC Desire Z / G2, and installed Cyanogenmod 7 onto it. Something I've noticed though is that sometimes the battery drains very quickly, and sometimes it does not. Since I have ...
8
votes
1answer
2k views

What happens to the battery during bootloader/recovery?

I want to know what happens to the battery (does it charge/discharge/stay constant?) when the device is in bootloader or recovery mode. In both of these modes, a USB may or may not be connected. If ...
8
votes
1answer
46k views

How to set gmail sync frequency?

I want to know how often Gmail checks for new emails because I need longer battery life. How can I see/set this? I want to set it so that, for example, it checks for new mail every 10 minutes and ...
8
votes
2answers
4k views

Can I leave it plugged in for charge all the time? -Samsung Galaxy 3 I5801

In short my question is - What is the battery level at which it starts charging again Samsung Galaxy 3 I5801 device when kept plugged in for charge all the time? If you want to know background and ...
8
votes
5answers
12k views

My phone thinks it's charging

After upgrading my Galaxy Nexus to 4.0.4, it keeps thinking the cable is being plugged in and out all the time. The battery discharges at a normal rate, even though the screen keeps lighting up as a ...
8
votes
1answer
6k views

Looking for a consistent answer about battery calibration

This forum is full of questions about battery calibration. The thing is, that either I'm blind or one answers contradicts others. In particular: For example forums says, that battery should be ...
8
votes
1answer
1k views

Where does “battery usage” app collect its data from?

The Battery Usage screen gives nice stats about which application has consumed how much battery. The stats are based on the time each process has kept the phone awake, the CPU time, etc. etc. There ...
8
votes
1answer
411 views

“Battery use” information screen not reporting apps

I've got a Samsung Galaxy S (international version) that I've just upgraded to Android 2.2 (Froyo) and now the battery usage page in settings (Settings => About phone => Battery use) only ever reports ...
7
votes
3answers
30k views

Can Android app repair battery's bad cell?

I know this was covered in a different post, but I've been wondering how this app can actually make a difference in battery life. I've tried many of these, and "Repair Battery Life" is the only one ...
7
votes
2answers
6k views

Can I use my Nexus7 charger to charge my Android phone?

The Nexus charger has an OP Amp rating of 2A. The charger that comes with the phone has an OP Amp rating of 1A. Both have the same voltage. IP voltage is 100-250 V for both. I googled and came across ...
7
votes
1answer
13k views

Should the phone be fully charged before flashing a rom?

In posts like this, and from other sources, I have heard that the handset should be fully charged before flashing or installing a customer ROM. I assume this is because the calibration for the ...
7
votes
2answers
6k views

How can I tell what is really draining my battery?

I know that by going to Settings > About Phone > Battery Use, I can get some idea of the applications that are using up the most of my battery. I see things like "Cell standby", "Phone idle", ...
7
votes
2answers
1k views

Why does my Nexus One power off with 15% power remaining?

Once my Nexus One's remaining power drops to 15%, it automatically powers off. On turning it back on again, it reports that it's now on 0% power. Do all Nexus Ones behave like this, or is it just ...
7
votes
1answer
1k views

Is battery consumption linear?

I am benchmarking an app using the batteryhistorian. The result is a chart where every percentile is a "tick". After I've measured the battery consumption and let the battery drain to half, I would ...
7
votes
5answers
959 views

How do I smite this unknown vampire process that is sucking the blood out of my battery?

I have a Samsung Galaxy S2 that I upgraded to 4.4 a couple of days ago. Since upgrading, my battery longevity has dropped a crazy amount. Just this morning, it took about four hours to go from full ...
7
votes
3answers
593 views

Other than the external LED indicator, how can I be notified that my phone is done charging?

I'm wondering if there is a setting that I am missing that allows an Android phone to produce an audio notification (or even vibrate) once charging is complete. As is stands, whenever charging is ...
7
votes
1answer
330 views

Do modern Android devices regulate AC mains power similar to a laptop?

There have been a lot of discussions about lithium-ion battery life across the internet. However, within these discussions I have found contradictory details about the way power is regulated between ...
7
votes
7answers
8k views

Battery drains even when plugged in while using Nav app on long road trips

I have a Nexus S running Android 4.0.3 and Google Maps 6.8.1. When I use the Google Maps navigation app, the battery slowly drains, even when plugged into my car charger. After 5-6 hours, the phone ...
7
votes
1answer
717 views

Is it normal for Android System to be the top battery user?

Over the past couple of days, the battery usage of my new phone has been as follows: 34% - Android System 28% - Cell Standby 21% - Phone idle 10% - Display 03% - Google Goggles 02% - ...
7
votes
1answer
2k views

Battery Stats Are Vastly Incorrect

After updating to 6.0.1 (MMB29K) from 6.0.0 (MRA58R) I have come to face a very odd and never seen before issue. My battery stats are wildly wrong. My stats show 4k% or higher and no battery stat ...
7
votes
1answer
2k views

Why do I need to remove my battery periodically to fix phone problems?

On my HTC MyTouch 4G (Android 2.3.4), twice now the diagnosis for odd failures was to take the battery out, wait a minute, and replace it. (The first failure was loss of network; the second was web ...
7
votes
1answer
808 views

Disable low-battery warning, specifically on XOOM

I would like to disable the low-battery warning on my XOOM without rooting. It's a pretty obnoxious sound compared to other phones I have used. By rooting, I can replace /system/media/audio/ui/...
7
votes
0answers
2k views

Why does my Android 4.4.2 sudden have a battery drain (Wiko Bloom)?

I'm currently using a Wiko Bloom, with Android 4.4.2, using the latest manufacturer update. A few weeks ago I was trying out the Llama app and after a while I noticed that out of nowhere my battery ...
7
votes
0answers
3k views

How to prevent shutdown when low battery? [closed]

When I'm using my hacky backlight modulation program which toggles screen off and on fast enough to simulate ultra-dim brightness Android sometimes gets wrong info about battery charge (it sees 0% 0V ...
6
votes
3answers
5k views

Although I was told to charge my Android device before first use, it was already charged. Have I been given a phone rejected by someone else?

I have just received my 'new' HTC one V. The instructions clearly state to charge the phone up before first use, yet the the phone switched on and showed full charge straight away, before I had chance ...
6
votes
4answers
368 views

Is the Nexus One battery charged when connected to a PC via USB?

Do you happen to know whether the Nexus One's battery is charged while being connected via the USB cable to a PC? If so, is this standard behavior for all Android devices that have a USB port?
6
votes
3answers
16k views

Battery Popup at 25%

I seem to have run into a bit of a challenge on one of our Android/Samsung devices... On the device, regardless of what's open, when the battery reaches 25% on discharge, the below screen pops up ...
6
votes
5answers
44k views

Serious battery drain (Screen, Android OS) after JB upgrade

Since I upgraded my Samsung Galaxy SII from Android 4.0.4 (ICS) to 4.1.2 (JB), my battery life has decreased dramtically. Running ICS I could easily have ~25% battery left when going to bed, after ...
6
votes
1answer
503 views

AC-USB Charging Device Makes Sounds when Device Fully Charged

This might not be the right place to ask this question, as it falls under the purview of electronics, however that SE is not about consumer electronics. And this phenomena has only happened with ...
6
votes
3answers
1k views

Why do some Android devices (Samsung) show battery charge in steps of 10% whereas others (HTC) show more accurate percentage?

Why is it that Samsung devices (and perhaps others) show the battery charge remaining in multiples of 10% whereas other devices are able to show a more accurate percentage like 96% etc? Is this a ...
6
votes
1answer
3k views

What does a red battery icon indicate?

While charging my Jellybean 4.1 device at my PCs' USB, I see the following red battery icon in the notification bar: What does the red color indicate?
6
votes
2answers
7k views

Does leaving a lithium-ion battery uncharged for 3-6 months at a time hurt battery life?

Does leaving a lithium-ion battery uncharged for 3-6 months at a time hurt battery life? I have seen plenty of questions and articles about the dangers of leaving your cellphone in the charger, but I ...
6
votes
1answer
16k views

Google Services battery usage

I recently updated to the 10.1 M snapshot of CyanogenMod for my Sprint Galaxy S3 (d2spr). Ever since I did the update, I have been seeing crazy high battery usage from Google Services. I have tried ...
6
votes
3answers
2k views

Is there a way to prevent applications from updating when running on battery

I know you can restrict applications to update on Wi-Fi only. Can you achieve the same thing with "update when charging on sector only" too?
6
votes
2answers
1k views

Battery life depends on type of charger

When I charge my HTC Sensation mobile with the charger supplied by HTC the battery duration is more or less 1 day (depending of the usage). But (here comes my question) when I charge the mobile ...
6
votes
1answer
1k views

Is there anything that can show exactly what has awaken my phone?

Recently I had some issues with my phones battery getting drained in 8-10 hours, even though the screen was active for less than 1 hour and wifi/bluetooth/gps was off. My first thought was to check ...
6
votes
2answers
447 views

Google Goggles Battery use

I have not even opened the google goggles app in several weeks. Why does my phone report that it is using such a large amount of my battery? This is especially disconcerting considering that this app ...
6
votes
1answer
350 views

Do I have to calibrate my battery after a reinstall?

When I installed Cyanogen Mod 7, I 'accidently' clicked 'Wipe Battery Status' even though my battery wasn't fully charged. Now I have no idea what this exactly does (even more reason I shouldn't have ...
6
votes
1answer
212 views

How can I see what kind of car charger I have?

I noticed that when using navigation plus GPS my phone (Galaxy S2) still discharges a bit even so its connected to a car charger. While googeling, I found out that regular USB chargers only charge ...
6
votes
1answer
897 views

Save battery by switching to 2G after a few minutes of inactivity

I'm looking for an app that'll switch to 2G only after a few minutes of inactivity. The idea seems simple enough, but I can't find it. JuiceDefender just disables the data connection, and re-enables ...
6
votes
2answers
7k views

How to fix a sudden increase in battery drain?

My Moto G phone (3rd gen; Android 6.0) used to charge rapidly and last over a day. I upgraded it from Lollipop to Marshmallow in mid-February and it still performed well. However, for the past 3 weeks ...
6
votes
2answers
623 views

Is there a black list of applications that drain battery fast?

Many people complain about some applications draining batteries fast because of bugs or misconfiguration. Is there a black list of such applications that are not energy-friendly?
6
votes
5answers
25k 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, ...
5
votes
5answers
16k views

How to limit charging to 60%

My UleFone Armor 2 has 4700 mAh, but I would like to limit it to 60% to reduce battery ag**g. The battery in more and more phones is not user-replaceable thanks to Apple's toxic influence on the ...
5
votes
1answer
12k views

How does the Android estimate the battery level without a current sensor?

The BatteryManager class doesn't have the metric for current: http://developer.android.com/reference/android/os/BatteryManager.html And then I have found this post: https://stackoverflow.com/...
5
votes
3answers
5k views

What is the standard voltage and current levels for an android battery?

I am using Micromax Canvas Nitro A310; recently, I bought a new USB cable and it seems its not doing the job as required. My phone is not getting charged as it was before. Either it takes too long ...