my nexus 4 , almost 1 month old, died all of a sudden ,only thing its doing nw is flashing a red light on charging. Cant switch it on or even cant reboot. As discussed in the this form i initially thought its complete battery drainage issue. so i kept the phone charging for almost 24hrs ....still no use... i bought it frm US thru my cousin and im staying outside  , so its not kind of easy for warranty claiming also .
122148
This morning my Nexus 4 wouldn't turn on, so I plugged it in, but the white battery recharging icon doesn't show up when I press Power, and holding Power doesn't turn on the phone. Instead the notification light blinks a deep red. The screen was totally unresponsive.  Lots of websites have plenty of doom and gloom hinting that red light = device is bricked, but I see no official source for this. What does this light mean?
28977
Is it OK to use an iPhone 4 that is fully charged while keeping it plugged to wall outlet?   I am worried about stressing battery too much since it is charging and discharging at the same time.  Any issues here?
33223
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 built specifically for my phone. How true is this across droids?
22848
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 should be able to handle this kind of scenario and automatically stop charging the battery once it's full. Does this apply to modern Android phones? Or do I need to continue disconnecting it all the time?
39559
Phone : nexus 5 version 2013 Android version : 6.0 Kernel version : 3.4.0-g2aa165e Build number : MRA58N   For the last few days, 10118 has been draining my phone's battery. It drains battery by using GPS. I typed 'ps' in a terminal emulator, and there was no application with PID 10118. I don't know what exactly 10118 is. My guess is that it's one of recently installed weather apps.  How can I fix this?    Screenshots (click images for larger variants)
15532
I have an old iPad and want to give it to a friend.  I plugged it in with a new lead that charges another 1st gen iPad I have, but it's not coming on.  It's not been used for about a year. It's been plugged in now for 20 minutes.  Any ideas?
9849
I'm having problems with my laptop keyboard - specifically, some keys don't work any more.  The problem started three months ago - just three months after I purchased this ASUS K42F - when the left Alt key got busted. I cannot forget that moment because I was editing something important in Photoshop that required the use of such key. I didn't bother to do something about it; I still have the right Alt key anyway.  I was surprised when two days ago, almost half of all the keys in random positions didn't work any more. I haven't spilled any liquids on the keyboard, and I know nobody else has either because I always put this laptop in a vault when I'm out (privacy is a problem here). I've tried everything, from scanning for viruses and spyware to using compressed air, but nothing has worked. I hope someone can help me with this before I'll be obliged to visit the seller whose location is very far from mine. I still have the one year warranty.
48701
I have had a Nikon d750 for a year or so, and 6 months ago it took on a bit of saltwater damage. It still works, but twice in the past it wouldn't power on, once for two weeks and once for two days.   Now it is at a point where it takes around 5 minutes to power on, and when i switch the camera to 'off' or standby, it completely powers off as if the battery drops out, then it takes another 5 mins or so for it to power back on, if it does at all. So I have switched the standby timer in the settings to 'infinity' so it just stays powered on.  I am taking it in to have it looked at, I just hope the damage isn't too fatal. I wonder if anyone has experienced anything similar to this, or can help me diagnose the actual problem. I have tried different batteries, and everything else possible really. Camera itself works fine, just power issues.  thanks in advance.
75645
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 the number of charging cycles for his battery. He says that if he lets it charge all the way up to 100%, it will mean he has to replace the battery of the phone more often.  Is this true?  Somehow, I feel this is a thing of the past. I thought the internal architecture of batteries these days was made so that it wouldn't drop too low or too high. (In other words, when the phone is at 100%, it isn't really 100%. It's what the battery can safely be charged to in order not to degenerate too much.)  Here's a  which taught me something about this.
113821
I have an ASUS N550JK laptop (BIOS version 204) running Ubuntu 14.04 (3.13.0-43-generic kernel).  My issue is that the battery indicator ALWAYS shows that it's using battery power - even when plugged in and fully charged. So even though I have selected to show the battery status in the menu bar only when charging or in use (in power settings), it is ALWAYS displayed. When it reaches a full charge, the indicator icon will either show just the percentage (usually 99% or 100%), or sometimes a very big number for time (like 22:14) along with the percentage. If I go to the power settings menu, it always says "Using battery power", with something like 40 hours remaining. This is all while plugged in and fully charged.  Are there any fixes less drastic than trying to update BIOS, or is a BIOS update necessary to fix this? The latest BIOS version is 208 according to the ASUS website, but the (very brief) descriptions of the updates don't mention anything about battery issues. If at all possible I'd like to avoid updating BIOS because of the risk involved.  I've already tried letting the battery drain all the way and then charging to full, with no luck.  Thanks in advance!
15109
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.
17613
Quite similar to . If I'm not mistaken any impulse mobile device charger is still consuming power, when plugged into socket, but when cable is disconnected from charged device. Correct?  Does the same rule goes for power sockets equipped with USB ports for charging mobile devices ( to Polish seller):    I was wondering, if this kind of construction means that my socket(s) will be continously draining power, 24 hours a day, no matter if anything is connected to it or not? Or do these have some kind of power-off "switch" (meaning stops draining power when everything is disconnected)?
44721
I'm far away from civilization thats why I need your help guys. My problem is: MacBook Pro 13" early 2015 is not turning on and charging and the trackpad is also dead.   Charger's LED does not shine by any light(red/orange/green) . But I tested my charger with another MacBook and charger is working. I tried to connect another charger. First 1-2 minute I can see green light and then LED turns off. Trackpad is not react to any action (like double click). Right now this is just some plastic area Turn off and turn on battery connector also didn't help me.   The laptop did not receive any damage and was not flooded with water. Day or two before I got it from safe and checked my email then closed it and put to the safe again(hotel standard safe) (everything was okay but I didn't remember battery charge percent at that day) then I open and figured out that MacBook is dead.
88216
So, I have this iphone that my parents found. I need some advice on how to find the owner. It's a puzzler though.  It was dead and I'm an android user so I couldn't power it up to find the owners info. So, I took it to the Apple store assuming that since I thought Apple was all about service, they would just take care of it.  No such luck. They said they couldn't help me. They did let me charge it up though. Might I point out that it's really stupid how long you have to wait for usability when plugging in a dead iPhone.  Anyway, when it finally became usable (20 minutes of standing foolishly in the Apple store later), it immediately popped up a little message saying it had no sim installed and when touched it just displayed a lock screen. The store employee told me there was nothing that could be done with that except a wipe.  I doubt a carrier would be helpful since there is no sim. I was under the impression that the sim couldn't be removed from an iphone though. Is that inaccurate?  Anyway, it also said the date was December 31st and my parents just found it a little over a week ago so I'm assuming it was sitting in that location for quite some time, which isn't all that surprising considering where it was. I guess maybe the clock isn't updating due to the lack of a sim... Just a guess though.  So now the only thing I really have to link it to it's original owner is the background pic on the phone which isn't much to go on at all. ;) Especially since it's half covered by the missing sim message.  Any ideas? You would think in this connected world that this wouldn't be that hard. Unfortunately I think it might be.
7036
I've been trying to design a charging system for a small robot powered by a 2S 20C  (LiPo) battery. Were I to trust everything I read online, I would believe that the LiPo will kill me in my sleep and steal my life savings. The common advice I read, if you are brave enough to use LiPo batteries, is "never leave unattended", "never charge on top of a flammable or conductive surface", and "never charge at a rate faster than 1&nbsp;".  I understand why this is prudent, but what is the actual risk with LiPo batteries?  Nearly every cell phone, both Android and iPhone alike, contains a LiPo battery, which most people, including myself, charge while unattended&mdash;often-times while left on a flammable or conductive surface. Yet you never hear about someone bursting into flames because their cell phone exploded. Yes, I know there are freak accidents, but how dangerous are modern LiPo batteries? Why do so many online commenters treat stand-alone LiPo batteries like bombs waiting to go off, but don't even think twice about the LiPo sitting in their pocket?
71350
I have an iPad Mini that I have had sense the fall.  This morning I woke up and it was working fine.  Now it won't turn on.  I've tried all the regular fixes and nothing is working.  Will the manufacturer warranty cover this?  Should I take it to an Apple store?
35491
Some iPhone users (especially those with devices that've been in use for a while) encounter a problem where the device crashes once the battery gets low. For example:        "After updating to iOS 7 my iPhone 5 has been doing something strange.   When the battery gets low (usually around 20-30%), iOS will shut down   completely, and when you try to power the phone back on it flashes on   the screen telling you to plug the phone in to charge it (saying that   the battery is almost completely dead).   The phone refuses to power   on until you plug it in, but once I plug the phone in and power it   back on, the battery life shows the last percentage it was at before   it crashed (20-30%). This has happened to me more than once, so I know   it's not just some crazy fluke."      "I have a 3GS that is almost 2 years old now and had a hard life. It   has now developed a tendency to crash when the battery gets below 25%.   it will restart using the top button ok but as soon as you put any   strain on the battery it crashes when at this low level. When the   phone is charged it seems to work fine."      "I have a weird problem with my iPhone 5. My phone switches off when   the battery is low. I was at 23% charge and just browsing facebook   when my battery died. The other day I was at 13% charge and it   switched off. Last week 17%.. It refuses to switch back on until it   was plugged into the wall. I have tried restoring the phone and set up   as new but I still have the same problem. It just seems to switch off   when the battery is low at different percentages."         It seems to happen on various model iPhones and versions of the OS; it's currently happening to me on a heavily used two year old 4S running iOS 6.1.1.   that:     "The common element in these crashes is low battery life, usually under 20 percent, although one crash occurred at almost 30 percent. When I give the iPhone power, it restarts immediately and shows the expected amount of battery life remaining. So it’s not that the battery is actually running out; instead, [iOS's] power management code is freaking out once the battery level falls to around 20 percent. I do see a number of LowBatteryLog files in Settings > General > About > Diagnostics &amp; Usage > Diagnostic &amp; Usage Data, though their contents don’t reveal a smoking gun. Letting the battery run down completely and then recharging entirely to recalibrate it made no difference."   (NB. TidBITS writes about this as it pertains to iOS 7 only.)  So, my question:   Do we know, technically, what is causing these crashes beyond simply "the power management code is freaking out"? Are there any software hacks, fixes or usage habits (beyond usual battery saving/care techniques and "just get a new battery/don't let the battery get low!") that might help avoid these crashes?   (I'm interested in general answers, but in case it's of use  are the low battery logs from my two most recent crashes.)