Questions tagged [battery-life]

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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276
votes
6answers
76k 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 ...
185
votes
22answers
109k views

What can I do to increase battery life on my Android device?

What can I do to get better battery life on my Droid? Battery life seems awful. Less than 15 hours or so on normal usage.
83
votes
4answers
298k views

Battery Life and First Time Charging on Li-ion Batteries. Myth? [closed]

"Ok you bought a brand new mobile phone with brand new battery, after checking its working ok kindly switch it off and charge it fully (100%) then start using it. IT WILL INCREASE YOUR BATTERY LIFE.", ...
70
votes
1answer
320k views

What is *Cell standby* and how can I keep it from eating my battery?

Looking up my battery statistics, I almost always find Cell standby amongst the top consumers: I never thought that "idle" would use so much energy. I saw that other people encounter similar problems:...
54
votes
4answers
25k views

Do bright wallpapers spend more battery than dark ones?

I started wondering about this when I realized most websites I visit have white backgrounds, and I know that the screen is usually responsible for most of the battery usage. Since I can't change the ...
40
votes
4answers
47k 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 ...
34
votes
3answers
45k views

How can I avoid the battery charging when connected via USB?

I'm using my Samsung Galaxy S2 for development so I regularly plug it while it's not fully charged, and my phone starts charging over USB. I think this (charging while in use) can affect battery life (...
33
votes
3answers
90k 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 ...
27
votes
4answers
26k views

What is USB debugging? Can I keep it ON forever?

Sometimes I need to transfer some music from my PC to my Galaxy S2 and must always activate USB debugging. Then I think, can I keep it ON forever? I mean, Keep it ON for ever can give me a problem (...
26
votes
7answers
8k views

Is power consumed from battery to run the phone when charging?

I want to download torrents while keeping the device plugged to charge. My device is made by Samsung. Is the power consumed from charger, or battery, to power the device when charging? Will my ...
24
votes
3answers
35k views

What's the meaning of signal strength colors in battery usage screens?

The battery usage screen has an indicator for "Signal strength" that, instead of being blue/black like WiFi, has many colors: green, gray, yellow. What's their meaning?
24
votes
2answers
30k views

Does 'poor' reception deplete the battery quicker?

In the area where I live I sometimes have trouble with reception. The Internet stops working for me or it takes time to load pages. The phone tries and tries to connect. It seems to me that when this ...
24
votes
11answers
19k views

How does power usage for data over WiFi compare to data over 3G? (Ignore LTE for now)

If you have unlimited data over 3G so that cost is no option, which is more power efficient? Using the WiFi or 3G connection for data usage? Extending battery life being the goal
22
votes
3answers
7k views

When should I start charging my Lithium battery?

The comments in this question say that I shouldn't wait until low battery charge level before I charge, because that reduces battery life (this is contrary to my understanding before that the faster ...
22
votes
3answers
83k 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 ...
20
votes
1answer
13k views

How does Android obtain battery temperature?

I am curious about the way Android phones obtain the battery temperature. Android has an API called BatteryManager which provides the value of instant battery temperature, but is there an actual ...
19
votes
1answer
23k views

Battery percentages per app nowhere near total

when I look at my Nexus 5 with android 5.1. battery screen, I can see something like this: Screenshots (click images for larger variants) Sum of all per-app percentages in list is 10. However as ...
19
votes
4answers
22k views

Google Services is killing my battery by keeping phone awake

In the last few days my Galaxy S3 has gone from lasting 12-13 hours to about 6 hours. On checking the battery monitor it seems to suggest that the phone is constantly staying awake and that Google ...
18
votes
3answers
9k 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 ...
17
votes
6answers
41k 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 ...
17
votes
2answers
4k views

How to diagnose battery drain on Android device using logcat?

I have been facing a severe battery drain issue on my official Cyanogenmod custom ROM. After discussing it on community forums, it was suggested that I use logcat for troubleshooting the problem. ...
16
votes
9answers
166k views

Displaying Bluetooth gadget's battery status on the phone

I have a Bluetooth headset (BlueBuds X) which uses a battery. I want to know its battery status directly from the phone. I've looked everywhere and I cannot find a solution that isn't a scam. Is it ...
15
votes
2answers
32k views

How does fast-charge work?

How does Fast Charge work? Does it actually charge your device faster, and if so, Is there a downside to using it?
15
votes
1answer
4k 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?
15
votes
4answers
2k views

How can I improve the battery life on my device? [duplicate]

Possible Duplicate: What can I do to increase battery life on my Android device? My Desire is absolutely great, but with my usage the battery life is really a big problem. I have a few apps ...
14
votes
7answers
104k views

Will constantly having Bluetooth on drain my battery too fast?

I'm thinking about making an app which will require Bluetooth to be available at all times. However, if this reduces battery charge life significantly, then that's kind of a show stopper. Can anyone ...
14
votes
1answer
5k views

Why would I automatically share usage and diagnostics data?

In my Android settings (Version 6) I have the option to activate "to automatically share usage and diagnostics data". I suppose that this will help certain developpers - and of course Google - by ...
14
votes
2answers
45k 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 ...
13
votes
4answers
56k views

2G versus 3G: Does it really save battery?

I often hear the recommendation that fixing your device to 2G saves a lot of juice compared to using 3G. Is that true? Or is it really a myth?
13
votes
3answers
10k views

What's causing battery drainage by “Google Services” while packet data is switched on in a 3G dead zone?

Here's a picture of my Samsung Galaxy S2 battery usage page. Around the point where the battery usage started diving, I had added a calendar remainder, sent an email (to a new contact) and browsed ...
13
votes
3answers
519 views

Prevent complete charging?

I'm looking for a way to prevent my phone from completely charging every time it is connected to my computer. I want to reduce the battery's capacity loss, as it is non-replaceable, and it seems to me ...
12
votes
3answers
16k views

How frequently is it okay to let the battery discharge fully or as low as possible?

I know that atleast once or twice a month a full battery drain and then a 100% charge helps increase the battery life and also gives more accurate battery readings. I was wondering, how frequently is ...
12
votes
1answer
1k 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?
11
votes
6answers
7k 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 ...
11
votes
3answers
6k views

Ideal charging / discharging percentage for maximum battery life?

One of my friends has a relatively new Samsung smartphone. He has this app that notifies him whenever the charging is up to 80%, and tells him to unplug the charger. He tells me that it will increase ...
10
votes
7answers
7k views

What effect does tasker/locale have on battery life?

Locale and tasker look pretty cool. How much effect will they have on battery life?
10
votes
2answers
9k views

What uses most power: GPS or WiFi?

When playing Ingress I find that both GPS and WiFi (each by themselves) provide an acceptable location accuracy. My question is what draws the most power? I'm interested in technical information ...
10
votes
2answers
4k views

Is there any study on how which services/sensors consume the battery?

I am looking for some study/comparison on how battery-consuming are specific services/sensors (3G, Wifi, GPS, Bluetooth, accelerometer) in Android devices. I know that the exact answer might differ ...
10
votes
4answers
746 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 ...
10
votes
0answers
862 views

Doze behaviour on Nougat (7.0.)

Doze behaviour has been changed in Nougat. Doze is implemented in two stages When a device is on battery power, and the screen has been off for a certain time, the device enters Doze and applies ...
9
votes
5answers
20k views

Is there an app that will drain my battery?

Are there any apps that will specifically help to drain a battery down quickly? The scenario I would want to have this is if I want to quickly drain the battery so I can charge it fully again. Some ...
9
votes
4answers
1k views

Does GPS signal quality influence battery life?

Does bad/weak GPS signal affect battery life? For instance, when in the city downtown with lots of tall buildings or in the woods or mountains, will running GPS drain the battery faster?
9
votes
2answers
2k views

Power draw from GPS - Does granularity affect amount of power drawn?

We all know that GPS draws a considerable amount of battery power. Does anyone know of any studies that test the "granularity" of a GPS signal with how much battery is consumed? I'm not talking ...
9
votes
3answers
7k 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 ...
9
votes
3answers
25k views

Automatically limit (stop) battery charging at a given percentage

Device : Moto X Play ( Rooted, Stock, Android 6.0.1, msm8916 Board, XT1562) Why do I want to limit charging ? ( Let's leave out whether my reasons are valid or not and accept that I want to, if you ...
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 ...
9
votes
2answers
4k views

Turn off cellphone (SIM) radio

How do I turn the cellphone (SIM) radio on an Android phone? The radio consumes a lot of power (30-70%), especially when the phone is idle. Sometimes I only need to use other functions (e.g., clock, ...
8
votes
4answers
6k views

Battery level indicators: Do they consume more battery?

I have a Samsung Galaxy Y phone, the battery level indicator that comes pre-installed in the status bar, shows only a graphical representation of the battery level and does not gives a number (...
8
votes
1answer
23k views

Fast Charging by Qualcomm 3.0- impact on battery?

I am thinking of buying HTC one A9 My only concern is with fast charging . I have read this thread How does fast charging work? and understood the downside is mainly on battery life. Accepted answer ...
8
votes
2answers
9k views

Does disabling 3G while having WiFi save battery?

If I have WiFi enabled and 3G data disabled, does it save any battery relative to having both WiFi and 3G enabled? With WiFi enabled, I didn't know if 3G enabled would make any difference since it ...