Why do my Android devices take so long to charge? (We're talking an entire day or more)
Is anyone else experiencing this? What's going on?
If it were me, I'd wonder about two things:
1) the power source - is it reliable? bad power strip? are you using the same ports where you'd plug in other devices?
2) installed apps - seems likely to me. you might have something installed on both Android devices that's sucking battery, but it's definitely weird that it would do it at that rate. I would look at location-aware applications first, since those seem to suck the most battery life.
Like the other readers here, I haven't had this problem at all, and certainly not on multiple devices. I can charge half my phone's battery in about 30-60 minutes in my car, even while constantly playing podcasts over bluetooth, and without turning off my GPS or even WiFi.
Clicking the mark as good answer button helps us highlight the best answers.
I have the nexus 7 and with the device turned off it still takes a full 7-8 hours to charge. And yes, I am using the original charger and I have it plugged into the same outlet where I connect my Toshiba Thrive 10" tablet which takes about one hour to go from red-line to full charge.
So what apps would you look at that suck battery life while the device is turned off?
E.g. Dropbox, Box, Facebook, Google+, etc. can be set to upload photos only when WiFi is on. Currents can be set to sync only when plugged in. WiFi sleep policy can be set so that under normal use, WiFi goes to sleep when the display is turned off, except when plugged in.
The confluence of all this is that power usage goes up substantially when the device is plugged in, causing longer times to reach full charge.
In the battery graph in Settings, does it show that display is always on or the device is always awake when plugged in? That may be another reason for higher power usage when plugged in: in Developer Options, device is set to stay awake when plugged in.
I'd also do one (or both, though not concurrently) of the following:
- Run the device in safe mode for a few days and see if there's any improvement. To go into safe mode (introduced in 4.1 Jelly Bean IIRC) press and hold the power button till you get the power off/silent/airplane mode dialog box and long press on the power off option.
- Get BetterBatteryStats https://play.google.com/store/apps/details?id=com.... and see what it says under partial wakelocks after a few days of running it.
Like a good gadget owner, I drained my Nexus 7 batter to zero the day I got it. But I forgot to charge it overnight. Then I forgot my charger. So at work I borrowed a Nexus S USB (just because I knew his was micro usb) and plugged into my computer to charge. After 4 hours, I only had 19% charge.
Then, a buddy with a Nexus 7 had his USB cable with him, as well as the AC adapter. After about 50 minutes, I went from 14% to 39%- a significant increase.
So I'll be using that short USB cord from now on.
as for the Nexus 7 - you got me.... I either charge it overnight or shut it off to speed up charging.... its strange...