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

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2
votes
3answers
2k views

What happens when using a cellphone when charging?

What happens when a phone is being used with the charger connected? Will it take power from charger and save the battery usage? OR At one end, the charger keeps charging the battery and at the ...
2
votes
1answer
392 views

Why do Seidio's battery charging instructions say to leave it charging after it's full?

I have an HTC Droid Incredible. I bought the "Seidio Innocell 1750 mAh Battery for HTC Droid Eris/Droid Incredible", and the instructions that come with it say... In order to obtain the full ...
2
votes
2answers
574 views

Nexus One overheats/restarts when connected to car dock or car charger

Whenever I connect my Nexus One to the official car dock, my phone heats up rapidly, and eventually restarts. Obviously, the phone is restarting to prevent it from damaging itself. So the question ...
2
votes
4answers
10k views

Why can't I charge a Samsung phone?

I use a dual-port 2-amp charger with an Amazon Basics USB cable. This works perfectly fine to charge my Nexus 4 and the Nexus reports "AC" not "USB" as charging mode. From the recharge time it's also ...
2
votes
1answer
1k views

Do you need a special charger for a Nexus 7?

Do you need a special charger for a Nexus 7? I've been trying to use the same charger as I use for my Android phone and it works poorly. If you tilt the tablet upwards it's charging, but otherwise ...
2
votes
4answers
7k views

Galaxy S 2 battery won't charge while being on

First of all, LOVE the Galaxy s2, even though it has some problems - which phone doesnt, right? I've had the Samsung Galaxy S2 for 2 months. It worked fine. Since a week my phone won't charge the ...
2
votes
1answer
3k views

Possible to charge one phone off another?

What's stopping the ability of charging a cell phone from another cell phone? If I were to create a crossover/patch USB cable and connect it between two phones or tablets, would there by any way to ...
2
votes
2answers
13k views

What's the input current draw for the Nexus 4?

I am trying to find the maximum possible current draw of the Nexus 4 when recharging the battery. The adapter that comes with the Nexus, supplies 1.2A The Qi Charging Station needs 1.8A But I ...
2
votes
2answers
3k views

LG P500 Not Starting After Full Discharge

My LG P500, with FroYo, doesn't seem to be working. I let my battery completely die and now, even while plugged in, it won't turn on. Is this normal and should I just wait the battery to be charged ...
2
votes
1answer
185 views

Samsung Galaxy Tab Pro 10 discharging even when connected

My Samsung Galaxy Tab Pro 10 (SM-T520) will discharge when connected. While the battery icon shows that it's charging, the tablet will still discharge, albeit more slowly than when not connected. This ...
2
votes
1answer
108 views

HTC Rapid Charge 2.0 overheating battery

Since a few days ago I am charging my HTC One M8 using the HTC Rapid Charge 2.0 charger. It does indeed charge fast, but I have noticed that the battery gets really hot. After installing the DU ...
2
votes
2answers
6k views

Device Steadily Discharging While Plugged Into AC?

Question: My device (Galaxy Note 2 running the stable CyanogenMod release) is charging extremely slowly and discharges while it's plugged into AC power. What happened to cause this and what's ...
2
votes
1answer
725 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 ...
2
votes
3answers
18k views

Will playing a game in a Android phone while charging damage or cause harm to the battery or the phone?

Will the following situation damage or cause any harm to the battery or/and the phone: The phone is being charging (regardless it is using the electrical outlet or via USB) and .. You are playing a ...
2
votes
1answer
2k views

Android Estimate Battery Capacity

I have a phone with 3.7v, 1500 mAH genuine battery. This being said, the maximum power that this battery can hold can be calculated easily: 3.7 v *1500 mAH = 5550 mV. I'm trying to see what battery ...
2
votes
1answer
498 views

How can I connect my A500 to an iMac for charging and file transfers?

I have a Acer Iconia A500 and I am using an iMac. I cannot charge or share my device as mass storage with my computer over USB, though I am able to use bluetooth for transferring data. Are there any ...
2
votes
4answers
130 views

Why does my phone charge more quickly at some outlets than at others (with the same charger) [closed]

My cell phone seems to charge slowly, especially at my home (I've tried different outlets). But recently I was in a coffee bar, and it seemed to charge a lot - a lot! - faster. I was using the same ...
2
votes
2answers
74 views

Is there any relation between charging rate and discharging rate?

Sometimes when I do not use the original charger but a different one it would take less time to fully charge the device than the original charger would do. But I can feel that discharging rate is ...
2
votes
1answer
15k views

First battery charge on new tablet?

I got yesterday a Galaxy Tab 3 and I want to be sure what's the best way for the first battery charge. On the shop, they told just turn it on, wait for the battery to finish and then charge it to 100% ...
2
votes
2answers
9k 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 ...
2
votes
1answer
174 views

File Manager opens when connected to charger

I am using Sony XPeria with Android 4.0.4. If I connect the device to an AC adapter/charger, the ASTRO File manager opens by default. How to stop the app from opening when the device is connected to ...
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
6k views

HTC One X Does not charge or turn on

A day ago my HTC One X would not turn on. When I booted into developer mode it said at the top "**LOCKED**" and "Security Warning" (or something similar). It also said "cpu-bootmode: disabled". I was ...
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 ...
2
votes
3answers
10k views

Reset battery history after unplugging charger?

As far as I can tell, the stats on the Battery page of Settings records the time from when the battery is booted up onwards. What I'd rather want it to do, is to reset that counter whenever I ...
2
votes
1answer
616 views

How to train the battery

I am trying to find the way to use my battery in the most efficient manner. I found several suggestions how to achieve the longest life of the battery, and one of these suggestions is quite strange ...
2
votes
1answer
515 views

My HTC EVO 3D is unresponsive after charging

For about the past month or so, whenever I pull my HTC Evo 3d off the charger (wall primarily, haven't tested against USB yet) the phone is unresponsive for anywhere between 15-60 seconds, and it's ...
2
votes
3answers
409 views

Using Moto Droid Car Charger with Samsung Galaxy Nexus

I just upgraded my phone from the original Motorola Droid to the Galaxy Nexus. Both phones use the same micro USB port. Is there any reason I cannot use my Droid's car charger with the Nexus?
2
votes
1answer
222 views

Phone connected to charger full time - never sleepmode - any danger?

Yeah, might sound strange, but I managed do install Debian Linux on my Android phone. Because the phone needs very little power, it is, for me, the perfect server. I plan to disable sleepmode and to ...
2
votes
1answer
269 views

How do I turn off the light that comes out of my moto droid's usb port?

When I plug my moto droid into a charger a bright white light comes from the micro usb port. It is super bright when its on my nightstand and the lights are out. It drives me nuts.
2
votes
0answers
43 views

Phone doesn't charge via USB while on

I'm trying to figure out a charging issue with my Nexus 6 (Marshmallow 6.0.1). While I'm in Windows (10) and the phone is on, it won't charge over USB. If I turn off the phone it charges via USB. If ...
2
votes
1answer
72 views

What is a canonical battery test that I can use before and after upgrading the OS version?

I am about to upgrade from Android K to Android L. Right after, I will upgrade from Android L to Android M. In a previous empirical experiment, with a now-demised device, I noticed (or seem to have ...
2
votes
3answers
353 views

How can I tell how many milliamps my phone is drawing from the attached charger? Preferably without having to use a multimeter.​

Android.SE user "intuited" observes: I've noticed that my S4 doesn't always charge at its maximum rate of charge, even when it seemingly should. For example, car DC adapters that claim to provide ...
2
votes
0answers
408 views

Samsung Galaxy S4: After 5.0.1 update phone only charges when switched-off

While my phone was updating it was plugged in by the wall and charging. After the upgrade the battery was drained by the evening, and when I plugged it in to charge again, nothing happened. I ...
2
votes
1answer
2k views

Auto turn on after power on for an Android-based device

If I'm not mistaken, if an Android-based device is turned off (or powers down due to completely exhausted battery) and then is charged up again, it will automatically boot only to battery charging ...
2
votes
1answer
783 views

Where is the battery animation called when charger connected to phone (OFF)?

I have Moto E (Rooted) which turn on when connected with USB via Laptop but not when connected to Wall charger instead it shows Battery animation. I got to know that battery animation is at ...
2
votes
1answer
1k views

Where is the battery animation called?

I have a tablet from China, it's a Q8H Allwinner. It is rooted, and I've browsed the internal storage for hours to find the battery animation, I found them at framework-res.apk... Now I want to find ...
2
votes
0answers
33 views

How to prevent S3 from turning on when charging

I'm trying to charge a new battery with my phone turned off. As soon as I plug the phone in to the wall charger, the screen turns on and the phone tries to immediately boot instead of staying on the ...
2
votes
0answers
52 views

LG P880 Screen stays awake whilst charging

I have a phone that when I plug it in it turns the screen on and the doesn't go to sleep until I press the power off button. Is there a way to make the screen go to sleep automatically like when you ...
2
votes
1answer
258 views

Is slow charging bad for the battery?

I know that charging the battery too fast can overheat the battery and shorten battery life. But is charging it slowly, e.g. from a USB 2.0 cable plugged to a laptop, also harmful for the battery? I ...
2
votes
1answer
696 views

Battery charging indicator went crazy on my Samsung Duos S6802

While I was playing a game, my cellphone warned me that my battery went too low. I plugged the charger but it was like it didn't work (charger indicator didn't show the bolt icon). After several ...
2
votes
0answers
38 views

Battery percentage going down while charging! [duplicate]

(device: Samsung Galaxy S 3) I've just witnessed something rather strange: while tethering to my laptop, with the phone being plugged in a power source (the charger I got with the device) - the ...
2
votes
3answers
2k views

My Nexus 4 says it's charging but it's actually discharging

I plug in my Nexus 4 to a charger cable plugged into a wall outlet each night, and each morning I disconnect it. But sometimes during the day when it's not plugged in, like today, it says "Charging - ...
2
votes
0answers
5k views

Auto boot when charger connected (for HTC Magic)

I want to let Android OS to boot automatically when the charger connected (for HTC Magic) without pressing power button I found this guide: Complete boot when charging If your phone only gets one ...
2
votes
3answers
2k views

HTC One X won't charge

I bought a HTC one X in China, in order to send it to my girlfriend who's in UK, but she's constantly get charging problems. The problem is like this: Can't charge at all using AC adapter if the ...
2
votes
0answers
1k views

How to properly charge a Lithium Polymer battery [closed]

My battery is Lithium Polymer. I want to ask the following: Is a Li-Po battery essentially the same as a Li-Ion battery? Can I use my phone while it's charging? I've read that you have to calibrate ...
2
votes
1answer
4k 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 ...
2
votes
2answers
3k views

How to keep phone powered down while charging with ClockworkMod Touch Recovery?

In the course of setting up CyanogenMod 7.2 on my T-Mobile G2 (also known as the HTC Desire Z), I installed ClockworkMod Touch Recovery. My usual practice before that was to power off my phone and ...
2
votes
0answers
42 views

Can over charging damage battery? [duplicate]

Possible Duplicate: Does constant charging harm my Android cellphone? Indeed, this is a duplicate of: Does constant charging harm my Android cellphone? Just for the record -- let's say I ...
2
votes
0answers
445 views

Samsung Galaxy S stuck in boot loop when 100% charged

Before we start I should mention that I have not messed with the firmware in any way. But it seems that whenever I put it on charge and it reaches 100% capacity I turn it on and it gets stuck in a ...