Tagged Questions

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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0
votes
0answers
720 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 ...
1
vote
0answers
150 views

How can I recover lost Contacts on Galaxy GT-NT7000. Contacts and Dialer App became very slow and battery runs down fast,

This is a RAM issue and lost contacts issue (contacts not saved under Google). The log of text messages with all contacts, since start, is all, still there. My Android version is 4.2.1. I have had 3.5 ...
1
vote
0answers
251 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
264 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
673 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
41 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 ...
1
vote
1answer
322 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
1answer
3k 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 ...
2
votes
1answer
423 views

Does using an unofficial charger negatively affect overall battery lifetime of a GS4?

According to two employees at the Sprint store, using an unofficial charger for the Galaxy S4 will negatively impact the overall life of the phone's battery (edit: in other words, the battery will ...
0
votes
1answer
81 views

About WI-FI battery usage

I keep reading about how much battery does WI-FI use, but when I look in settings > battery, WI-FI shows with < 5% usage when I barely use the phone. And when I use it, the screen takes most of the ...
0
votes
1answer
408 views

Battery Status Indicator Error?

Okay so I have a very interesting story to tell.... Here is what happens... I charge my phone at night, wake up in the morning, pull it off the charger, about 9-10pm it drops to about 15%, which ...
0
votes
1answer
268 views

Samsung Galaxy s3 Battery life

How long should a Galaxy S3 battery last? My phone is brand new and today it was on standby for most of the day (it dropped 10% while being on standby for 3hrs), I only used the internet for about an ...
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 ...
2
votes
2answers
224 views

What are some reasons for big difference in time usage and small difference in mAh?

I have found an android phone with really good specs like 1.5GHz Quad Core, 1GB RAM, 5", HD screen. My question though is on the battery Battery Size: 2000mAh Usage Time: 6 Hours Battery Standby: 72 ...
0
votes
1answer
123 views

Do running applications and background processes have any effects on Power Consumption?

I need some help with android applications: Do running applications and background processes have any effects on Power Consumption of the Battery (running down so fast)?
9
votes
4answers
339 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?
1
vote
1answer
4k views

Is it better to detach a charger when my Android device gets fully charged? [duplicate]

When using my Android device at my desk, is it better to (from a battery health point of view) detach a charger as soon as the device gets fully charged, or is it ok to keep it on the charger? I like ...
0
votes
1answer
330 views

What do the different coloured bars on the 1x1 widget in Better Battery Stats app mean?

I understand these are supposed to signify ratios of different phone states but I cannot get my head around which is supposed to be which.
1
vote
1answer
610 views

How can one know if one's battery is damaged

What are the signs of a damaged or completely drained battery for Samsung Galaxy Note II? The battery displays it is empty and yet does not charge. It does not power the phone either. Am confused
3
votes
1answer
4k views

Looking for a consistent answer about battery calibration

This forum is full of questions about battery calibration. The thing is, that either I'm blind or one answers contradicts others. In particular: For example forums says, that battery should be ...
5
votes
2answers
4k views

What do CPU Total, CPU Foreground, and Keep awake mean?

I've been keeping an eye on my battery usage on my Android device (HTC One), mostly to see if I can drain it during a full work-day, and I came across the app usage details under the Power settings. ...
1
vote
2answers
72 views

Are there any issues in storing an Android battery?

I want to buy a 2nd battery for my i9100 because the phone is getting old and I don't know if parts will be easily available a couple of years on (don't want to upgrade, I like it too much), but I've ...
1
vote
1answer
2k views

Why does Better Battery Stats say my Galaxy S4 is awake 100% of the time?

I think the screenshots speak for themselves. Can't pinpoint a reason from what I see. Anyone can help please? Thanks Screenshots (click images for larger variants)
1
vote
2answers
127 views

Full battery completely depleted within a few hours without any user activity — what to do?

I left my phone on the table with full battery without doing anything with it. After a few hours the battery was completely depleted, and the phone automatically shut down. What could cause such a ...
2
votes
0answers
20 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, ...
0
votes
3answers
1k views

Sony Ericsson DISCHARGES when plugged in

I have a Sony Ericsson Live With Walkman (WT19i). About a week ago my phone started discharging when plugged in for charging using either a Samsung wall charger or the USB port on my PC. It charged ...
6
votes
1answer
941 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 ...
0
votes
1answer
65 views

How to stop all but 1 one app including their services?

My HTC Sensation's battery does not last long. I'm going for a Marathon race which should last at least 5 hours and I'm going to use 1 app (RunKeeper) for that period. I would like to preserve as ...
1
vote
0answers
752 views

Galaxy S3 Mini drains excessive battery when Wifi is ON

This question is linked to this one: Wifi battery saving tips or automation This time, the question is different. I have here a Galaxy S3 Mini phone that behaves strange. When Wifi is OFF, battery ...
3
votes
1answer
2k views

How does the Android OS estimate remaining battery time?

Is it known how the Android OS estimates time to failure / remaining battery charge? I am doing a school project about battery estimation on mobile devices but have not been able to find any ...
0
votes
3answers
203 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 ...
1
vote
1answer
447 views

What does power saving do exactly?

What changes happen in functioning of the phone after you turn it on? My device: Samsung S3 Mini
3
votes
4answers
21k views

Does Cyanogenmod reduce battery life?

My galaxy mini was running GB 2.3.6. I recently rooted my phone and installed CM 7.2. Now it looks like my battery is getting drained a little quicker than before. From what I have heard CM increases ...
4
votes
1answer
13k views

Display screen keeps waking up when locked

When I lock my Samsung Galaxy Nexus by pushing the power button, my phone's screen darkens for a few seconds, then keeps staying awake with the lock screen displayed. This keeps eating away at my ...
10
votes
3answers
19k 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?
-2
votes
1answer
23k views

Unusual battery drain on note II [closed]

My Note 2 battery is driving me insane. I have been using my Note 2 for like 2 months. And I had been following the recharging cycle where you only charge the battery when it reaches 5% or less and ...
3
votes
1answer
6k views

Should I keep my Android tablets' power off or leave them on standby mode?

Should I keep my Android tablets power off or leave them on standby mode? Which option is better? I have two tablets: Allwinner A10 single core 10 inch (old one) and Allwinner A31 quad core 9.7 inch ...
7
votes
2answers
3k 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 ...
2
votes
1answer
1k views

Why is my battery low only a few hours after charging?

Twice recently I have charged my Samsung Galaxy Ace at night and when the phone indicates it's fully charged I unplug the charger only to be woken a couple of hours later thinking I have a text come ...
6
votes
3answers
7k views

Nexus 7 charges very slowly, even with 2 amp chargers

I'm facing a rather painful issue with the battery life/charging issue with my Nexus 7 (4.2.2) When idle and plugged into my 2A charger with the stock USB cable, it charges VERY slowly. I'd say ...
1
vote
0answers
4k views

Custom ROM to improve Galaxy I9000 battery life (if mostly standy)? [closed]

I have a Galaxy S I9000 (2.3.6, Gingerbread.XXJW4) and use my phone minimally (mostly just on standby). I would like a least a couple of days, and hopefully a week or two between recharges if possible ...
6
votes
3answers
3k views

What kind of power saving smarts does Android already have?

I just d/l tasker and it's been really interesting (although not as interesting as I would've liked since I feel a lot of the good features require a root). I would like to optimize my Galaxy s3 so ...
0
votes
1answer
380 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 ...
1
vote
1answer
693 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
3answers
7k 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
4answers
8k views

Battery drain on Galaxy Note-I after updating to Jelly Bean

I have Galaxy Note-I (N7000), and upgraded to Jelly Bean 4.1 today. The battery drains fast. Do we expect any update from Samsung on the battery drain issue, or do I need to downgrade to ICS?
8
votes
3answers
4k 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 ...
1
vote
0answers
108 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 ...
4
votes
1answer
141 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 ...