Questions about Battery life (how long each charge last) or/and Battery Durability (how long until it needs to be replaced) should use this tag.

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2
votes
1answer
72 views

What is a canonical battery test that I can use before and after upgrading the OS version?

I am about to upgrade from Android K to Android L. Right after, I will upgrade from Android L to Android M. In a previous empirical experiment, with a now-demised device, I noticed (or seem to have ...
2
votes
0answers
483 views

Turn screen off without Android sleeping

Is there any way to quickly toggle the screen off without making Android sleep? For example, I sometimes like to use the Calm app when I sleep. But it keeps the screen on all the time. When I just ...
2
votes
1answer
296 views

Why don't the percentages on the battery chart add up to anywhere near 100%? [duplicate]

I'm trying to figure out what's using my battery life by looking at the battery page in Settings. (I don't know if this screen is Cyanogen specific, or a stock Android feature.) Here's a recent ...
2
votes
1answer
54 views

Does the GPS hardware draw power when no app is using it?

That is to say, does the hardware itself do any periodic updating/searching for satellites, etc, if there an no running apps which require GPS information? If so, what sort of effect does it have on ...
2
votes
0answers
12k views

Google Play services using up battery - Why and how to fix it?

Why would Android devices have Google Play services using up the second-most amount of battery usage over a 24 hour period (second only to screen power)? On one device, I see Google Play services ...
2
votes
0answers
62 views

Why is the battery usage graph so useless? [duplicate]

Is it just my phone (Nexus 5, 5.1) or did the battery usage graph become useless in Lollipop? I've attached a graph from today that, at first (and second) glance, makes no sense at all. This is after ...
2
votes
2answers
18k views

com.android.systemui rapid battery drain

I have a Samsung Galaxy S5 that is approximately six months old. My OS version is 4.4.2, and my provider is AT&T. The battery in my S5 will usually last me 2-4 days without charging, depending on ...
2
votes
0answers
98 views

Build android from source. Battery power incorrect

I added a kernel module to the msm flo kernel. I built android JB from source for my Nexus 7(flo). I flashed the device with the built OS. My battery power seems to be stuck at 100% remaining. I ...
2
votes
1answer
256 views

Is slow charging bad for the battery?

I know that charging the battery too fast can overheat the battery and shorten battery life. But is charging it slowly, e.g. from a USB 2.0 cable plugged to a laptop, also harmful for the battery? I ...
2
votes
0answers
193 views

Why is GPS Status eating a third of my battery power?

I'm trying to have as little as possible running when I'm not using my phone. In the system settings under battery you can see what has been using the most power. I've been able to disable or ...
2
votes
0answers
873 views

2G vs 3G Talktime

When I was going through specs for my Xperia SP, I found the 3G talk time to be more than the 2G talk time. Talk time: Up to 10 h 25 min (2G) / Up to 19 h (3G) More over I went through the specs ...
2
votes
0answers
21 views

Is it safe to keep Android charging through USB all day? [duplicate]

When I'm in front of the computer, I always keep my Android phone plugged into a USB cable so it's always at a 100% charge and I can type text messages from the convenience of my PC keyboard. Still, ...
2
votes
0answers
1k views

How to properly charge a Lithium Polymer battery [closed]

My battery is Lithium Polymer. I want to ask the following: Is a Li-Po battery essentially the same as a Li-Ion battery? Can I use my phone while it's charging? I've read that you have to calibrate ...
2
votes
1answer
4k views

Is using chargers of phone not meant for it harmful to the battery? [duplicate]

Possible Duplicate: Is my phone liable to explode if I charge it with a charger that came with a different phone? Are Android chargers universal in terms of power (Voltage, amperage)? As ...
2
votes
1answer
3k views

Why does my myTouch 4G lose battery so fast?

So I formatted my phone today. I have not used it, and it was at 100% this morning. No apps installed, the screen was only on for about 10 minutes. Yet when I go to check it now, about 12 hours later, ...
2
votes
1answer
469 views

What factors does PowerTutor measure to show energy consumption?

I am trying to find the impact of the signal strength on the energy consumption of WIFI in Android using an HTC NEXUS ONE. I am sending several files starting from 1 kb to 600 kb. I use PowerTutor as ...
2
votes
4answers
2k views

Screen uses 99% of battery

I have Galaxy Ace S5830. I tried using many different Jelly Bean and KitKat roms, and with each one (clean installs, without additional apss) my battery behaves weird. When screen is turned on, even ...
1
vote
1answer
983 views

Battery usage for keeping apps open

How much of an effect does it have on the phones battery life to keep applications such as the contacts application open. I ask because that app sometimes takes long to open the first time depending ...
1
vote
1answer
392 views

Number of Wi-Fi channels to be used?

Under advanced wifi settings one can change number of Wi-Fi channels to be used (11, 13, 14). Does anyone have a clue on how does this property affect battery drain? I know it should be configured ...
1
vote
2answers
685 views

Shorcut on desktop that enables packet data and 3G

In order to save battery (it works a lot!), 99% of the time I disable packet data and I use only 2G networks, because I don't want the phone to go on internet / use data. But sometimes I want to use ...
1
vote
2answers
586 views

How to prevent Nexus 7 of charging the battery every time when connected to a USB?

Hello fellow Android enthusasts, I recently bought a Nexus7 that I want to use for development. The thing is, every time I connect it to my USB, in order to test some apps on it, it starts charging. ...
1
vote
1answer
467 views

Battery life in dual-boot HTC HD2

I own a dual-booting HTC-HD2 with MIUI on SD card. I already knew, from tutorials, that in order to maximize battery life I should first-boot Android only with 100% of charge. This is currently ...
1
vote
3answers
370 views

How to keep my battery life? [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android phone? Today I woke up after a night without charging my phone (galaxy s2). and he's dead, last night he was almost ...
1
vote
1answer
670 views

Is it possible to force enable the battery saver mode in Android Lollipop?

It is possible to automatically enable battery saver mode in Android 5.0 when the battery hits 5 or 15%. However sometimes it would be nice to enable this mode by hand. e.g. when the battery is still ...
1
vote
1answer
391 views

Could PowerTutor app measure exact whole power consumption of devices using GPU?

I'm developing face detection app using OpenCL for heterogeneous devices with CPU-GPU. My app uses CPU - GPU simultaneously. So I want to measure app power consumption comparing only GPU version which ...
1
vote
1answer
522 views

How to list apps, which have a permission to access the camera?

I am experiencing the problem with the mm-qcamera-daemon on a Nexus 5 with 4.4.4, as described in this question. I would like to know if there is a way to see which apps have a permission to access ...
1
vote
1answer
2k views

Notification led's generic consumption?

Okay I know that all phones got different hardware, and that leads uses just a little power. But. What if I set my led notifcation speed to high (like the light will pulse faster)? How much would ...
1
vote
3answers
4k views

Nexus 5 whole battery drained in a single night

I charged my phone to 100% before going to sleep. I used it for only few minutes and found out my phone was off in the morning because all the battery was drained. I charged it and saw battery stat ...
1
vote
1answer
594 views

What kind of hardware problems is a cheap Android phone likely to have?

For development and application purposes an organisation I am with is considering buying a cheap Android handset here in India (this is the handset). But what kind of problems can one anticipate in ...
1
vote
5answers
7k views

Is there a way to automatically turn off wifi?

I have an LG P990, and I recently upgraded it to ICS. Since that, the charging is much slower and energy consumption is much faster. I could live with it, I charged it at work and at home too. ...
1
vote
1answer
2k views

Android clearing recent applications list

After exiting the applications on my Galaxy nexus, they appear on the recent applications list. Do they still use CPU/battery? Do I have to remove them from recent applications list in order to save ...
1
vote
1answer
558 views

How much does an LCD's backlight drain the battery?

The screen tends to be one of the biggest consumers of electricity. How much of this is for the backlight vs the actual screen, particularly in the case of an LCD?
1
vote
1answer
407 views

How do you change the screen background on Nexus S?

Just bought a Samsung Nexus S. No manual came with it. Apparently the moving default screensaver eats up heaps of battery life and I am not getting much battery life out of this new phone and I am ...
1
vote
1answer
424 views

Connecting to internet using Wi-fi portable hotspot or bluetooth? which one is more battery saving?

I have EDGE internet connection in my Samsung Europa I5500L (Froyo 2.2). I can connect to the Internet from my laptop using both bluetooth or making a wifi hotspot from the device using that EDGE ...
1
vote
3answers
403 views

Battery Life on Desire HD

Why does the battery for android phones perform much better after 2 or 3 weeks of usage? Is there any logical reason?
1
vote
2answers
49 views

How to prevent brightness when battery reaches high?

I leave my phone (Samsung Galaxy 4 GT-I9506, Android 5.0.1 lollipop) charging on my table when going to sleep. It reaches full after some hours often. It is so annoying when the display becomes bright ...
1
vote
2answers
315 views

Battery Issue with Android 6.0

I upgraded my Karbonn Sparkle V to Android 6.0 recently. after a couple of days the battery drains quickly. hence charging the phone also takes hours. this was not at all a issue when it had lollipop ...
1
vote
1answer
240 views

Effect of changing resolution on battery

There are various ways to change the resolution on Android devices, and I was wondering: Does it have any noticable effect on battery life? And has anybody ever tried doing some proper measurements?
1
vote
1answer
3k views

Very high battery drain by Android OS, Android System, and Screen in Samsung Galaxy Note 3 running Lollipop

I've got a Samsung Galaxy Note 3 (SM-N900) running Android 5.0. The battery life is terrible. Most of the battery is taken by Android OS, Android System, and Screen. The moment I switch the screen ...
1
vote
2answers
7k views

Battery of Samsung Galaxy S5 drained in 5 hours on Android 5.0

I received the over the air android 5.0 update a week ago for my Samsung Galaxy S5. I installed the update and since that the my fully charged battery is depleted in 5 to 8 hours. Before the battery ...
1
vote
1answer
194 views

How to drop out of airplane/flight mode periodically to check messages

I normally keep my phone in Flight Mode (called "Airplane Mode" under 2.2) in order to save battery power. When I have some time to check messages, I turn off Flight Mode, re-enabling the cellular ...
1
vote
1answer
6k views

Google Maps runs GPS in background even if the GPS radio is off - how do I fix?

I have the T-Mobile version of the LG G2, running Android 4.2.2, everything stock except the keyboard. I'm not sure what version of Google Maps, but the Play Store says it's up to date. Yesterday I ...
1
vote
3answers
8k views

GPS Battery Drain — LocationManagerService

EDIT 3: Someone pointed me in the right direction on another forum. There was a bug with HD Widgets that rolled out yesterday. HD Widgets Bug As of yesterday I am getting a 35%/hour battery drain. ...
1
vote
2answers
2k views

“Restrict Background data” with Jelly Bean on tf300t ASUS tablet

On my tf300t ASUS tablet (with wifi only) I tried to set "Restrict Background Data" following Settings->Data Usage->three boxes in the upper right corner, but there is no such option. I read on ...
1
vote
3answers
21k views

Battery drain with in no time in Samsung Galaxy Ace

I have Samsung Galaxy Ace for almost an year now. The battery of my phone get discharged now with-in no time of charging. The battery status in Setting -> About Phone - > Battery use shown the ...
1
vote
1answer
155 views

Using a fully charged Galaxy Note

Is it safe to use a Galaxy Note that is fully charged and at the same time it is plugged in to the wall socket? I'm worried that the battery might be charging and discharging at the same time and it ...
1
vote
1answer
876 views

Beside shut down the phone, are there ways to prevent battery usage for Call Standby?

Beside shutting down the phone so that the battery will not be used for Call Standby or/and Phone Idle, are there other ways that can prevent the battery from being wasted? (Would the use of ...
1
vote
1answer
217 views

Power management on Android — is app CPU correlated to power usage?

2 questions: Is application CPU usage on Android correlated and how highly to battery usage? In other words, are apps that suck a lot of CPU also draining the battery or not necessarily? Is there a ...
1
vote
2answers
748 views

Power being eaten by screen usage

This morning, when I woke up my phone was out of battery power. So when I checked the battery usage I see the message Display had been used 90%. This kind of situation had never happened to me ...
1
vote
1answer
61 views

How is an “average use” defined in terms of battery life

It is common to see better battery performance being touted as a selling point, when phones are announced and when they but the market. And the claim typically goes like "lasts xx hours on average ...