For questions specifically about issues with battery charging or power supply.

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180
votes
6answers
34k 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 ...
5
votes
4answers
3k 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 ...
23
votes
3answers
20k 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 ...
10
votes
3answers
6k 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 ...
3
votes
2answers
927 views

Why does my phone have erroneous input when connected to a non-OEM power source?

My phone (Motorola DROID RAZR MAXX) seems to have problems accepting touch input when connected to a non-OEM power source. When connected to my computer via USB, it accepts input fine, as it does when ...
14
votes
2answers
3k 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 ...
19
votes
4answers
2k 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 ...
9
votes
4answers
4k views

Disable USB charging

For some reasons not related to the battery life, I need to disable the battery charging when a USB host is connected to my phone (a rooted Nexus 4). Taking a look around on the internet (link1, ...
13
votes
10answers
26k views

Galaxy Tab is not being charged through USB Cable

Currently i am using Samsung Galaxy Tab, model is GT-P1000, to test my application, so i usually attach it with PC through USB cable and it is attached for a whole day though it is showing low battery ...
8
votes
2answers
5k views

What's the safe limit on charger output for a Galaxy Nexus

The charger that came with my Galaxy Nexus phone outputs 5 volts at 1 amp. I have another charger that outputs 5v at 2 amps. Is it safe to use this charger? What's the limit I can use without damaging ...
26
votes
7answers
26k 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.
17
votes
4answers
12k 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 ...
12
votes
3answers
5k views

Are Android chargers universal in terms of power (Voltage, amperage)?

I would like to buy a car charger, wall charger and USB cables for my Samsung Intercept. However, $20 for a charger seems expensive and I want to avoid getting ripped off. The Samsung Intercept Manual ...
6
votes
1answer
7k views

Using an OTG cable while charging

Most Android devices have a single port for both connecting to the computer (USB) and charging. I have to use this OTG small cable to transfer data, but also to use a real keyboard. However, when I ...
6
votes
4answers
28k views

How much power does a Galaxy Tab 10.1 charger need to supply?

The Samsung Galaxy Tab 10.1 comes with a special charger which (I'm assuming) provides a higher current output than the USB standard. Without it, the device can actually die, even if the USB cord is ...
5
votes
1answer
10k 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 ...
62
votes
4answers
73k views

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

"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.", ...
8
votes
5answers
4k views

Is there a quick-fix for the Galaxy Nexus when it signals “charging” without beeing connected via USB?

My Galaxy Nexus goes into charging mode but when it isn't plugged in. The battery symbol then indicates a charging and when in suspend mode, the display turns on which drains battery rapidly. I am ...
4
votes
2answers
41k views

Samsung Galaxy Tab, charging technique through USB Cable

From Galaxy Tab is not being charged through USB Cable @Chris Stratton Tablets have larger batteries than phones and may be unable to sufficiently charge from the half amp limit of a USB port, ...
16
votes
4answers
14k views

Where is “Stay Awake” option in Ice Cream Sandwich on the Galaxy S3?

I just upgraded to the Samsung Galaxy S III (Ice Cream Sandwich) from the Motorola Droid Bionic (Gingerbread). On my Bionic, there was a "Stay Awake" check box that made it so my "Screen will never ...
5
votes
1answer
1k views

How can I charge an ASUS Transformer while connected to USB?

Currently I'm developing with my Nexus S but would like to use Asus Transformer for that. So far I figured that device won't charge from USB. And for me - I need to have it on USB for debugging while ...
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 ...
3
votes
0answers
352 views

Android stuck in downloading mode

So what happened is that my mobile (Galaxy S4 - GT-9500) ran out of charge. When I plugged in the charger and tried to turn it on, it went directly to what I think is the recovery mode (Android logo ...
3
votes
1answer
3k views

Micro USB cables that only charge but no data, no mounting etc (Samsung Galaxy S)

Not all cables seem to be created equal but I've never got to the bottom of why so many (cheap) cables I try only charge - no data. Anyone know why? Certain pins not connecting? I do know that longer ...
2
votes
2answers
3k views

Is it safe to use phone while charging with portable powerbank?

I understand using phone while it is being charged by a normal charger is not advised. What about using phone while it is being charged by a portable charger (powerbank)? I own a HTC one and i was ...
1
vote
1answer
254 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 ...
0
votes
2answers
559 views

DX752 purchased for Christmas will not charge

The iRola DX752 purchased for Christmas does not charge. It worked for a while. Does not work when plugged to an outlet either.
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 ...
15
votes
1answer
4k 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?
13
votes
1answer
2k 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?
11
votes
5answers
8k views

How to make screen stay turned off when plugging charger?

When I plug charger into my phone with screen off, it always turns the screen back on. This is slightly annoying at night. Is it possible to configure android so that the screen stays off and charging ...
5
votes
8answers
10k views

Automatically power on Android when the charger is connected

Is it possible to automatically power on the device once the charger is connected given that the device is initially turned off?
4
votes
2answers
774 views

Is battery calibration important for Android phones?

I heard that battery needs to be calibrated for a first few usages. I heard that battery needs to be calibrated every 40 charge cycles. I heard that i must not let battery get too low and not ...
2
votes
1answer
6k views

Prevent ICS From Mounting USB Storage

I have a Motorola Droid Razr Maxx running Android 4.0.4. I'd like to prevent ICS from mounting USB storage every time I plug it into a USB host. I just want it to charge by default. I am very ...
11
votes
6answers
3k 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). ...
7
votes
4answers
5k views

Nexus 4 problems when charging

My Nexus 4 is not charging when plugged into wall but it charges when connected to PC USB. When plugged into wall nothing happens, the battery icon shows nothing. This problem appears and disappears ...
7
votes
4answers
9k views

My phone thinks it's charging

After upgrading my Galaxy Nexus to 4.0.4, it keeps thinking the cable is being plugged in and out all the time. The battery discharges at a normal rate, even though the screen keeps lighting up as a ...
7
votes
2answers
2k views

Am I overcharging my phone? [duplicate]

Possible Duplicate: Does constant charging harm my Android cellphone? I am using my Xperia Active for application development. Given that scenario, I obviously have the phone connected to ...
7
votes
1answer
859 views

No touchscreen response when charging

I have a new HTC Desire S in the UK unlocked from Amazon running Android 2.3.3 and HTC Sense 2.1. When I charge the phone the touchscreen is non responsive. I have tried changing Settings > ...
4
votes
3answers
15k views

“Charging paused. Battery temperature too high” while connected to car charger

I have a Galaxy S2 with ICS. When I use it in my car, while it is charging from a car charger, I occasionally get this popup: "Charging paused. Battery temperature too high" Also Waze is running ...
3
votes
7answers
9k views

Charging the Asus Transformer (Prime)

Can you charge the Asus Transformer (or the newer Prime) without the keyboard dock? Since the tablet itself does not have any USB ports, I don't see how you could charge the tablet without the dock ...
1
vote
1answer
97 views

Is it safe charging a Galaxy Nexus through a USB 2A port? [duplicate]

This is a newbie question. While travelling, I need to recharge my Galaxy Nexus and my digital camera, both of which are meant to be charged through a micro-USB port, ie. 0,5A. To reduce charging ...
8
votes
2answers
542 views

Other manufacturer's USB data cable for charging?

Is there any harm in using a USB data cable of any other phone (say LG) for charging up a Nexus S? "Any harm" here means will it adversely effect my battery life or the Nexus S device in any way?
7
votes
1answer
5k views

How do I disable the lock-screen when my Samsung Galaxy S II is charging/connected via USB?

When I develop for my Samsung Galaxy S II, the screen locks as usual after the configured time. However, for development it would be practical if the phone would just stay awake while it is connected ...
6
votes
3answers
2k views

Although I was told to charge my Android device before first use, it was already charged. Have I been given a phone rejected by someone else?

I have just received my 'new' HTC one V. The instructions clearly state to charge the phone up before first use, yet the the phone switched on and showed full charge straight away, before I had chance ...
5
votes
1answer
234 views

AC-USB Charging Device Makes Sounds when Device Fully Charged

This might not be the right place to ask this question, as it falls under the purview of electronics, however that SE is not about consumer electronics. And this phenomena has only happened with ...
4
votes
1answer
321 views

Why doesn't my device ever show 100% charged?

I have a Samsung Google Nexus S I9020A which showed fully charged @ 92%. 100% charging doesn't seem possible. What is the reason?
4
votes
1answer
4k views

How do I turn on the battery full notification sound?

Similar to this previous question, but I want to enable the battery full notification sound, not the opposite :) My Galaxy S used to make a nice beep and switch the screen on briefly when the battery ...
2
votes
1answer
2k views

Samsung Galaxy S2 can't transfer pics, shuts down by itself, does not charge

My Samsung Galaxy S2 (not rooted) has all sorts of problems. It started when I tried to take some pics today. I would take a pic, and it would shut down. I tried to get pics off my phone by syncing ...
2
votes
1answer
3k views

Is using chargers of phone not meant for it harmful to the battery? [duplicate]

Possible Duplicate: Is my phone liable to explode if I charge it with a charger that came with a different phone? Are Android chargers universal in terms of power (Voltage, amperage)? As ...