Battery life is important for mobile devices. Questions regarding battery life should use this tag.
10
votes
7answers
4k views
Power saving tips for Galaxy S2 that don't involve turning it into a dumbphone
My Galaxy S2 has always shown not more than 8 hours of battery life.
This is with the stock ROM, as well as the recent 2.3.5 update and a rooted kernel.
All the battery saving tips I've seen ...
2
votes
2answers
183 views
Power saver turns display brighter. Shouldn't it be darker?
When my battery is running low, the power saver turns on. When that happens, my display gets brighter. Shouldn't it be turning darker to reduce the power consumption? Is it normal to get brighter or ...
4
votes
1answer
550 views
Auto sync only when connected to a specific wifi network
I am getting rather low battery life when using auto-sync on 3G. I have wifi in college and at home, so I'm looking for a way to enable auto sync only when connected to those 2 specific wifi networks.
...
0
votes
1answer
81 views
WiFi tether without losing battery
So, as everyone already knows, when tethering data over WiFi your battery may overheat/lose battery/etc. What I want to do is while in my car:
Stream internet over WiFi to >1 person
Navigate with ...
12
votes
3answers
3k views
Battery - do they last longer if recharged when empty?
I'm about to buy a Samsung Galaxy Ace (it's not much expensive and I think it's a pretty good phone), however everyone has been complaining with the battery life but admitting that isn't bad compared ...
9
votes
3answers
21k views
How can I find out what causes “Android OS” to consume battery?
The issue is that I see a high percentage on the "Android OS" item in the Battery Usage, and I want to find out what is causing it. But let me say that I'm interested in diagnostics techniques and ...
6
votes
1answer
325 views
Do battery saver apps really work? Is it possible to save battery programmatically?
There are numerous apps in the Google Play store claiming to double or triple the battery life. Is it just a myth? Or can they really?
If they really do save some power, why doesn't Android do it by ...
3
votes
2answers
134 views
Service that syncs pictures only when charging
I've been using Dropbox camera upload to automatically sync my pictures to my PC using my data plan (this part is important, I can't use a wifi).
However, this autosync eats up the battery like ...
2
votes
2answers
3k views
Can I permanently disable the cell/radio of my phone?
My wife got a new phone with a new service, so I get to have her old phone to play around with.
Since the old phone no longer has cell phone service, I want to completely disable the cell phone or ...
0
votes
1answer
2k views
Why are Dialer, Cell standby, and Phone idle killing my battery?
HTC G2 with Cyanogenmod 7.2.0, T-Mobile. It used to last all day, I'd always plug the phone in before bed and it would rarely run out of energy before then. Lately it runs out mid-day.
Today I ...
1
vote
1answer
327 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 ...
2
votes
1answer
572 views
What is preventing my Android phone from going to sleep? It is eating through the battery quickly
My phone is the Motorola Droid 1, rooted and modded with CyanogenMod 7. This problem did not occur before I modded it. When I check the battery stats, the awake bar is always solid, so something is ...
1
vote
1answer
203 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 ...
10
votes
3answers
7k views
Mediaserver using excessive CPU time and battery
I've got a Nexus 4 on OS version 4.2.1 that suddenly started to drain it's battery very quickly. When looking in the battery usage I see "Mediaserver"eating 60% of the battery over time, with several ...
0
votes
3answers
4k 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 ...
0
votes
2answers
844 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. ...
3
votes
1answer
2k views
Get rid of 'battery-low' popup after some delay?
I'm using an Android phone (a Motorola Defy+ running CM9) with OsmAnd as a map solution mounted on my motorcycle (it just shows the map and a gpx-track as a driving hint).
It's not connected to a ...
1
vote
2answers
6k views
My phone keeps slowing down and burning battery. How can I debug performance and cpu consumption? (DHD 2.2)
I know there are already a lot of threads about suggestions on how to improve performance and, strongly related, save battery life on your android. I also have tried most of the tools to diagnose ...
2
votes
1answer
624 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
702 views
Why does my EVO Android phone screen keep turning on?
I have an HTC EVO and I can be sitting around doing nothing, when all of a sudden the screen comes on and stays on. I try to turn it off, but it keeps turning back on - sometimes after a second, ...
4
votes
3answers
253 views
How do I determine which process woke up the screen?
The screen woke up at 4am or 5am at night, and had been on ever since.
How can I find out the process that was responsible for screen-wake ups?
The device is Galaxy S III running Android Jellybean ...
4
votes
2answers
2k views
How do I recalibrate the battery of my phone?
After a year using my phone, I noticed the battery drains too fast, but after shutting down I manage to make it work again for a couple of minutes before it shuts down automatically.
I read that to ...
7
votes
3answers
280 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 ...
19
votes
3answers
7k views
Do I have to charge my phone before I use it the first time?
When I got my last phone, a SE k850i, I was recommended to charge it fully once before I even turned it on. Does this apply today as well, for my coming HTC Desire HD?
Why was I recommended to do so ...
1
vote
1answer
248 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. ...
12
votes
1answer
1k views
charging from power outlet or computer? to save battery lifetime
I realized that charging my HTC Desire (Android 2.1) takes longer if connected to computer compare to power outlet.
Does it matter which method I use to charge in terms of battery life time?
2
votes
0answers
222 views
How to properly charge a Lithium Polymer battery
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 ...
1
vote
2answers
274 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 ...
4
votes
1answer
348 views
Is there any reason not lock the CPU frequency to the minimum while the screen is off?
To save battery, I have created a "screen off" profile with SetCPU that locks the CPU frequency to the minimum while the screen is turned off. Could this have any negative side effects on apps that ...
11
votes
1answer
722 views
Which method of wireless tether uses the least amount of power? Bluetooth or Wifi?
If I'm going to wireless tehter to my Android phone what method drains the battery the least? Wifi or Bluetooth?
0
votes
1answer
375 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 ...
4
votes
1answer
205 views
Does Gingerbread use extra battery power to make calls when the phone has poor signal?
Since I got this phone (Galaxy S, originally on Eclair, then Froyo) and switched network provider, I've had major problems with the signal at home, and call quality as a result.
Following the upgrade ...
7
votes
5answers
500 views
Enabling GPS flag on android preferences: what is the battery impact?
Even if there are many questions regarding Android and GPS my doubt is really specific to the user level location settings.
Supposing I've enabled the GPS settings, say from the Power Control widget, ...
4
votes
1answer
323 views
How much battery does using live wallpapers drain?
I know they are unnecessary, but they look so cool!
3
votes
1answer
70 views
Can anyone explain to me what the % really refers to in the Android system, battery usage?
I am wondering what the different percentages really refer to in the battery usage section. I mean...in total I see more than a 100%. So it is easy to presume that it doest mean a certain percent out ...
3
votes
2answers
3k views
Galaxy S3 cell standby is eating my battery
My battery on my new S3 seems to be being eaten up by the cell standby using more than 50%.
I appear to get a decent signal on the phone. Does anyone have any idea why this figure would be so high?
1
vote
1answer
77 views
How can battery usage of Android be at 79%?
Till last night everything was kinda balanced.....most of the different parts of the usage were in between 20-35 %, but this morning after having activated the internet from my network provider, it ...
3
votes
3answers
559 views
Ways to improve battery life on Droid Incredible?
Out of the box, I noticed my Incredible has a lot of stuff running/turned on by default. Besides the basics of turning off WiFi, GPS, and BlueTooth when I'm not using them, are there more steps I can ...
5
votes
2answers
7k views
Will rooting my phone improve its battery life?
I've had an HTC Desire HD with HTC Sense for about a year and I'm quite happy, except for the battery life. After upgrading to the latest version, it lasts about 24 hours with moderate/low usage.
I ...
9
votes
4answers
649 views
Gingerbread has drastically reduced my battery life
I have a Nexus One, and since upgrading to 2.3.3, my phone lasts several hours less compared to 2.2.x. I've swapped out to a new battery, which didn't make a difference. In about 14 hours (of nothing ...
6
votes
2answers
529 views
Faster CPU means higher battery consumption?
A friend of mine and I have the Samsung Galaxy Tab 10.1.
His tab is flashed with a custom kernel giving 1.2Ghz instead of the 1Ghz I have by default.
Using antutu benchmark, we saw what we expected, ...
1
vote
0answers
164 views
Poor battery after update to Android 4.0.3
I updated my non-rooted Samsung Galaxy S2 from 2.3.5 to 4.0.3.
Now, I recognize a significant decrease in battery lifetime.
Any idea what may cause it and how to get around it?
1
vote
0answers
84 views
Wi-fi disabled during lock still partly active? Or do I mis-interpret the battery graph?
On my Google Nexus 7 I noticed that it would consume around 1% of battery each hour that it was just being idle. I suspected that battery-usage during idle time could be improved. So the next night (7 ...
6
votes
2answers
343 views
What determines power management policies in Android?
I am just approaching to the Smart Phone and Android world and have a couple of doubts:
Which modules (and SW or FW?) decide the policies with which power is
given to any component of the Smart ...
2
votes
1answer
919 views
What does “awake” mean?
I obsessively check the battery info on my ICS phone, and I've noticed that I get the best battery life when the phone hasn't been "awake" much. But I realized I don't really know what "awake" means. ...
137
votes
4answers
14k views
Does constant charging harm my Android cellphone?
I usually disconnect my cellphone from the charger some time after it's fully charged because I'm afraid the battery could lose capacity over time if I don't. However, I believe modern electronics ...
14
votes
3answers
7k views
How to deal with (orphaned) WakeLocks?
I guess most of you at least have heard about WakeLocks. Many of you will have experienced them already -- wether knowingly or not. Some may know how to deal with them in general -- but only few know ...
3
votes
3answers
234 views
What is my phone doing at 1 o'clock in the morning?
I have recently installed JuiceDefender (JD) and along with it JuicePlotter (JP). JP gives me a nice graph about my energy consumption over time. I noticed that around 1 A.M. my phone uses up more ...
2
votes
3answers
192 views
Settings -> About phone -> Battery use bug?
When I open the "Battery use" screen it says that the phone is on battery for 14663d 4h 34m 53s, which is clearly wrong. The graph shows a linearly descending line. What is the problem? Why does the ...
4
votes
3answers
129 views
When did my phone power off due to low battery? Is the information recorded somewhere?
I'd like to know when my Android phone powered down due to low battery. Is there a log or way to see this? I am running a new program that makes use of BlueTooth and I suspect that's the problem. I ...
