Questions tagged [battery]

For questions related to batteries on Android devices. Questions about battery life should be tagged with [battery-life]

Filter by
Sorted by
Tagged with
286 votes
6 answers
79k 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 ...
  • 2,961
195 votes
22 answers
110k 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.
77 votes
9 answers
110k views

How to disable battery full notification sound?

When battery has been charged full, my Galaxy S phone gives the same notification sound that is used when I receive SMS. Is there a way to disable the sound without also disabling sound from SMS? It ...
  • 1,679
44 votes
6 answers
98k views

How can I find app name by UID?

In "battery history" I have found that the app with UID 10058 is using a lot of battery. How can I find the name of the app with UID equal to 10058?
  • 593
41 votes
5 answers
36k views

Why are some USB chargers slower than others?

It seems with USB chargers for my android phone, not all are created equal. The first pic is the official charger which came with my phone (galaxy nexus). It charges quickly, from 0 to 100% in a ...
  • 989
37 votes
10 answers
162k views

Why is charging from computer using USB slower than using an outlet?

And what is roughly the ratio of the charging speed in USB vs charger? My phone is Samsung Galaxy S, if that matters.
  • 2,319
37 votes
3 answers
56k 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 (...
  • 471
33 votes
3 answers
109k 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 ...
  • 455
31 votes
1 answer
10k 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....
  • 38.5k
27 votes
5 answers
134k views

How to limit charging to a user defined limit? [duplicate]

My UleFone Armor 2 has a 4700mAh battery and I would like to limit the charging to 60% to reduce battery aging. The batteries in most of the phones are not user-replaceable and I am worried that a ...
26 votes
7 answers
11k 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 ...
  • 369
25 votes
1 answer
17k views

How does Android calculate battery consumption by apps?

How does Android measure energy used by individual hardware component? How does Android measure energy used by each individual process?
  • 353
24 votes
4 answers
7k views

What causes battery to drain faster than it can charge?

I have a Moto DROID (v1). On a trip from Tyler, TX to DFW airport I had my phone in the car dock and charging. I was using Navigation for directions to the airport and also had Listen running to ...
  • 2,270
22 votes
3 answers
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 ...
  • 2,319
22 votes
3 answers
84k 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 ...
  • 413
21 votes
2 answers
11k views

Charging over USB can be harmful?

Considering that charging over USB can take around 5 hours (to only 1-2 hours it would take from the wall mounted plug), can it be harmful for the smartphone battery if it's always charged from USB?
  • 2,365
21 votes
4 answers
18k views

Why my phone battery has four terminal? what is the use of the fourth?

I have a LG Optimus One (P500). For sometime I am wondering why my phone's battery has four terminals. I am aware that two terminals are for the positive and negative points and the the third connects ...
  • 7,124
20 votes
6 answers
14k views

Cut power to a phone without a removable battery?

Well just as the title says, if you have a phone without a removable battery (HTC One X) and it freezes while modding it, how do you cut the power if you can't pop out the battery? I could see non ...
  • 333
20 votes
1 answer
15k 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 ...
  • 373
20 votes
3 answers
42k views

How do I turn off the cellular radio without disabling bluetooth?

I have an old Motorola Droid that is no longer subscribed on any Verizon service. I still use it for things like web browsing, ebooks, and along with some wireless stereo headphones, music. I've ...
  • 483
20 votes
2 answers
47k views

Using Android phone without battery

Some Android phones have removable batteries, and others are non-removable. It is the battery capacity that makes the device alive for hours. Also, the device can be used while charging. For an ...
  • 2,175
19 votes
6 answers
45k 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 ...
  • 2,512
19 votes
1 answer
5k views

How do I fully charge my emulator battery?

It bothers me to see half charged battery. Anyone knows how I can fully charge it?
  • 293
19 votes
7 answers
83k views

What can cause "Android OS" process to use high percentage of battery?

I've read a bunch of forum posts about the Android OS battery drain bug. This is where the 'Android OS' process is showing large percentages in the battery statistics. For me, I'm running 2.3 ...
  • 2,825
18 votes
3 answers
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 ...
  • 283
18 votes
3 answers
16k 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 ...
  • 1,171
18 votes
5 answers
4k views

How to choose micro USB cable for my device?

The plug sure looks like any old micro USB plug. Will another cable (like the one from my digital camera) work to charge the battery, or do I need one specifically designed for my phone (incredible)
  • 2,404
18 votes
3 answers
45k 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 ...
  • 38.5k
17 votes
6 answers
27k views

How RAM usage effects battery drain?

I'm really confused about Android memory management. I just read here that killing apps by swiping from recent list or using task killers won't save your battery but drain more because this cause the ...
  • 2,695
17 votes
1 answer
6k views

Battery drops 20% after reboot!

Battery on Samsung Galaxy S2 on ICS likes to drop after reboot. Actually it happened when I was on Gingerbread as well. Anyone can help me fix this? Screenshots:
  • 501
16 votes
5 answers
1k views

Wearing down battery as fast as possible

I am trying an experiment and I need to wear down my Droid Incredible's battery as fast as possible. What apps are known battery hogs? I've already beaten Angry Birds so that one is off the list for ...
  • 349
16 votes
2 answers
33k 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?
user avatar
16 votes
4 answers
21k views

How to allow auto-update of apps in Play Store only when plugged in?

I would like apps to be updated automatically when my phone is plugged in (charging) and on wifi. I can easily allow auto-update only when wifi is on with the appropriate option in the Play Store ...
13 votes
3 answers
639 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 ...
  • 383
12 votes
6 answers
7k views

Is it OK to swap batteries while phone is connected to wall charger?

It takes a few minutes to shut down and restart the phone, it would sometimes be handy to be able to swap batteries without shutting down (i.e. swap in a fully charged battery before going out). ...
  • 3,729
12 votes
4 answers
8k views

Is my phone liable to explode if I charge it with a charger that came with a different phone?

My friend and I both have droids and we often user each other's wall chargers out of convenience. I was told that it's possible that my phone might explode if it's charged with a charger that wasn't ...
  • 803
12 votes
3 answers
17k 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 ...
  • 511
12 votes
5 answers
23k views

WiFi drains battery even if it's off

On my Nexus 5, since Android updated to marshmallow, the Wi-Fi is draining the battery way too fast, even when disabled. See the screenshot: (Click image to enlarge) I've seen this question: Battery ...
12 votes
1 answer
21k views

Nexus 7 wont boot after complete discharge

I accidentally let the battery on my Nexus 7 run completely empty, and now it won't start up anymore even after charging overnight. How can I make it work again? This is what happened in detail: My ...
  • 513
12 votes
6 answers
46k views

Strange WiFi battery usage on Marshmallow Nexus 5

I have a question about the WiFi battery usage on the Nexus 5. In the first screenshot you see my battery/WiFi usage. The second screenshot shows the battery/WiFi usage for the Nexus 5 of a colleague ...
  • 129
12 votes
4 answers
324k views

Charging paused. Battery temperature too high or too low

I have a Samsung Galaxy player that has been giving me the message "Charging paused. Battery temperature too high or too low". I left it unplugged and powered down all night, and it still gave me the ...
  • 121
11 votes
2 answers
45k views

How does the App "Battery Repair" work?

I just found this App (Battery Repair) on the Google Play Store, my question is how can it make my battery last longer. What optimazions are they doing? Has anyone tested this tool, does it work?
  • 1,087
11 votes
4 answers
9k views

Which consumes less battery: Wi-Fi or 2G data?

I just want to know what consumes less battery Wi-Fi or 2G Data. My battery last long for 12- 16 hours only. I know there are lots of application which continually running and fetching data from ...
  • 213
11 votes
2 answers
41k views

How to measure battery capacity (mAh)?

I've bought an Android device (Motorola Droid 4) online yesterday, the seller claims that it's 3300 mAh (and that's one of two reason why I bought it), but when I receive the device and check it, ...
  • 325
11 votes
1 answer
1k views

What does "Battery Use" tell and how is it implemented?

I have several questions about "Settings -> About Phone -> Battery Use", mainly because I don't understand what exactly those items mean. (1) Does "Cell standby" indicate the energy used by the radio ...
  • 483
10 votes
4 answers
22k views

How can I take a photo when battery <20%?

How can I take photo when battery level is less than 20%? My Samsung Galaxy S always says "battery low" and then closes the camera application when I try to. Is there a way to get around this? Or is ...
  • 2,319
10 votes
1 answer
26k 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 ...
10 votes
5 answers
5k views

How can I tell at what rate my battery is charging?

I've been told that different charging sources charge my phone at different rates, and have been told that some car chargers act at a normal USB rate instead of a rate closer to an AC outlet. When I ...
  • 443
10 votes
4 answers
60k views

Android dies at 20% battery?

It all started about three months ago when my HTC One (M8)'s USB charging port died. At first the port would sometimes not work, you just have to move the cable around a bit for it to charge, then you ...
9 votes
5 answers
25k 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 ...
  • 1,355

1
2 3 4 5
18