Battery life is important for mobile devices. Questions regarding battery life should use this tag.

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2
votes
0answers
179 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
2answers
95 views

Is there a way to see which apps are using GCM?

I'm interested to know how many of the apps I have installed are using GCM. Is there a way to find out?
1
vote
0answers
150 views

Stay awake while charging, bad for battery?

Is it bad for battery to use the option to stay awake while charging? Will it make my battery drain faster in the future? PD: I use my phone for app development. I have activated the stay awake ...
0
votes
0answers
46 views

Does GCM use data from Android OS or Google Services?

I've noticed there are two separate entries for data usage -- Android OS and Google Services. What is the difference between the two? Which one ensures that GCM is working?
1
vote
0answers
210 views

Does GCM always work over cellular data, as APNS?

APNS always works over cellular data, even if you are connected to WiFi (because WiFi uses extra power, and thus iOS devices turn it off during sleep, without affecting APNS). Is GCM (Google Cloud ...
0
votes
1answer
122 views

Is there anything similar to APNS on Android?

Is there anything similar to APNS (Apple Push Notification Service) on Android? (APNS uses a single TCP connection between an iOS device and an Apple-controlled server, which issues push ...
1
vote
1answer
39 views

Is there a way to find out if a given app supports GCM (like APNS)?

Is there a way to find out if a given app supports GCM (Google Cloud Messaging)? (GCM is Google's version of APNS.)
-1
votes
1answer
318 views

Do any Android VoIP SIP clients support GCM (like APNS)?

It would appear that Android has a technology similar to APNS, called GCM (Google Cloud Messaging). Historically, in order to promote battery life, Apple did not let the apps run in the background ...
0
votes
0answers
2k views

Phone Radio uses 80% of my battery

I have GSam Battery Monitor, and it says that my Phone Radio is using about 80% of my battery. Why is this so high? I usually unplug my phone in the morning at 8AM, and I usually need to plug it back ...
0
votes
0answers
37 views

How do I know which apps are actually using battery?

There is a Battery section within Settings on my Galaxy Nexus, which shows which apps are using the most battery. However, it would appear that not all apps are present. For example, my mail client ...
0
votes
0answers
413 views

Battery and recharging suggested practices on Galaxy Note 3

Can someone please verify that the note 3 uses a Lithium Ion Battery? Does using the Note3 - for example making a call - while charging negatively impact it? My old flip-phone would heat up if I ...
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 ...
33
votes
1answer
75k 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 ...
0
votes
1answer
134 views

How can I increase my samsung galaxy fit's battery life?

I'm using Samsung Galaxy Fit(S5670) and running official 2.3.6 version. My battery's capacity is 1350mAh. Can I increase this capacity to 1500mAh or 2000mAh?
0
votes
0answers
39 views

Do the cores really operate at the frequencies requested by CPUFreq subsystem in Android phone?

I have SAMSUNG Galaxy Note-3 (SM-N9005) Qualcomm version, I want to know if it is really the case that cores operate at the frequencies requested by CPUFreq subsystem of the linux kernel, or CPUFreq ...
1
vote
1answer
3k views

How do I automatically turn off my android tablet when battery is low

I'm having problems with a android tablet that freezes when the battery runs low. Is there an option in android or an app that could turn off the tablet when the battery is below a certain % of power ...
0
votes
0answers
65 views

rb_producer process high cpu usage - CM10

For the past day, rb_producer (edit: and rd_consumer) has been the top process on my phone (bringing the load to 3+ on a single core devie).The device is therefore really hot and battery life is ...
13
votes
3answers
43k 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 ...
1
vote
1answer
283 views

How to solve the short battery life with galaxy s4?

I bought Galaxy S4 in just half year. However I found some wrong with the bettery, my phone shutdown automatically recently with over 20% battery. I can only use the phone for two hours after my phone ...
1
vote
1answer
77 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 ...
0
votes
0answers
69 views

Android battery life

I updated my note 2 to 4.3 version 2 days ago and since then my battery life has reduced to half what it was before updating my phone. Can anyone help me find out why my battery life has got so bad?
1
vote
1answer
754 views

Battery getting charged with ultra speed and continuous at 1%charge for more than 9 hrs

My neo v battery getting charged with in ten min from 0 to 100 percentage( Exponential growth graph ) with ultra speed and getting discharged to 1%( it also give alert showing last 1% left, keep ...
0
votes
1answer
75 views

Battery Boost?Drain?

I recently updated my Note 2 to 4.3 and it has been working quite well. But today in the train I was using it and the battery level drained to 20%, Since the battery was low, I switched it off and ...
1
vote
1answer
348 views

Is it possible to turn off radio without turning of wifi on Lenovo k900?

I am currently having a look at the power consumption of a lenovo k900 phone and on the hardware side it seems Radio and Screen is using most of the power. I am planning to use wifi but not the ...
0
votes
2answers
70 views

When selecting an USB extension cable to extend power cord, what are the relevant considerations?

I want to use USB extension cords to extend the USB power cords for my Android device. What are the factors that could affect normal charging behavior? (Consider "normal charging behavior" to be ...
0
votes
0answers
91 views

How to disable/remove ALL cell functionality

I have a Kyocera Event (Virgin Mobile) running stock Android 4.0.4. This is only used as a media player for about 90 minutes ONE DAY per week. I am looking for a good way to extend battery life as ...
0
votes
0answers
134 views

Are all the cores online at a time when In-kernel Cluster switching CPUFReq driver is in use in SAMSUNG S4 GT-I9500?

I checked the file /dev/bL_status in Samsung S4-GT-I9500 (exynos 5410 Octa version) root@android:/dev # cat bL_status 0 1 2 3 L2 CCI [A15] 0 0 0 0 0 [A7] 1 0 0 0 1 and it says that ...
1
vote
1answer
2k 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 ...
6
votes
5answers
13k 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 ...
16
votes
1answer
5k 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 ...
0
votes
0answers
659 views

How to debug “wlan_wake kernel wakelock” on an unrooted device?

The question is as short as the title. I've a Samsung Galaxy Note 3 & it has started showing issues where the CPU remains in lowest possible frequency (250Mhz) and it doesn't go to deep sleep. I ...
2
votes
1answer
274 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 ...
13
votes
4answers
9k 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 ...
178
votes
5answers
32k 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 ...
8
votes
2answers
19k 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 ...
6
votes
1answer
848 views

What can cause sudden drop of my battery in Nexus 4?

I have new Nexus 4 phone and I found it dead several times after the night. Obviously it wasn't used during night, screen was turned off. After I plugged it to the charger I had to wait a few minutes ...
1
vote
0answers
238 views

Samsung S3 Mini power save mode activity

I'd like to use power saving feature available in Samsung's TouchWiz in Llama but the only way to do this is to tell Llama particular activity/intent to run I guess. As in this thread on XDA. I'm ...
1
vote
1answer
216 views

Is there any battery-less Android-based device

I'be been working on some Chinese (bit crappy) device, with own system, that had one wonderful (at least for me) feature. When constantly powered-up (plugged to power adapter) it could work without ...
-1
votes
2answers
525 views

How to find android apps occupies RAM memory space?

I wish to know about which app is occupies more memory space in RAM when i use multiple apps Note: i just have RAM capacity of 256MB so that my battery downs soon.
0
votes
0answers
39 views

Why does the Android OS use so much battery power? [duplicate]

Most of the time, I have enough power for my Samsung Galaxy SIII to operate for the whole day; at the end of the day my battery charge is about 35%. However, today, the battery died prematurely. I ...
0
votes
3answers
199 views

Wifi battery saving tips or automation

A person that is not expert in computers & technology (including smartphones) bought a Galaxy Mini S3 and asked me some help. He is very old of age. The problem with this phone is that Wifi ...
23
votes
3answers
18k 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 ...
4
votes
1answer
140 views

“Phone” item using 10-15% of Battery Life

I've attempted to search for other questions answering this, but keyword ambiguity is working against me. On my Galaxy Nexus, my battery drains rather quickly. Very frequently, when viewing the ...
5
votes
4answers
3k views

Android Antivirus Software (solution and battery life relevance)

Is there a security solution for Android that's vastly regarded as "the best" one at the moment or is it like in the PC world where there's 3-4 which are "the best"? Also, what should I expect to ...
10
votes
4answers
694 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 ...
17
votes
4answers
11k 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 ...
1
vote
1answer
299 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 ...
4
votes
2answers
11k views

nlpwakelock and “Use wireless networks” option

Under "Location services" there is a "Use wireless networks" setting - whenever the setting is on, I get constant "nlpwakelocks" and the battery drains a lot faster. However, I see that this was ...
1
vote
1answer
2k views

Battery performance of Dual SIM phone running only one SIM

Does a dual-SIM Android phone running only one SIM yield almost the same battery life as a single-SIM phone? Will both the radios be running all the time regardless of whether both the SIMs are ...
0
votes
1answer
93 views

short battery life

I have a gs3 running slim bean, and the battery life seems horrible to me. I woke up this morning at 8:00am with 100% battery life and by 1:30pm it has gone down to 23% I have been I barely use the ...