BTW Nikon5400 does your battery continue to drain if you use it while charging?
I haven't tried yet. This tablet is a Christmas gift, so I can only play with it when nobody is around
I turned it on today for the very first time and it updated a few things. Battery drain was about 15% in 30 minutes (with android getting 38%), which I guess is not too bad for the 12.2" 2560 x 1600.
One thing I noticed - gps is on by default. I know new galaxy s3 keeps discharging when gps (google maps) is on and car charger is used. I believe car charger is only 0.5amps, while regular s3 charger is 1amp. I wonder if your (and maybe mine) charger is bad, so I'll try Note 3 charger next time. Note 3 uses the same charger and charges my phone from 0 to 100% in less than 2 hours.
I believe the issue is either the charger or the battery.
Previously I had an issue with samsung phones where they'd never charge to 100% when they were new no matter how long they were charged for. They would get to 97-99, but not 100. I remember getting a new battery and that solved the problem. Unfortunately tablet battery is not user replaceable, you should have asked them to replace it when it was in service, but because you can't see the battery there's no guarantee it'd get replaced (unless there's a way to get battery sn or something via some app?).
By the way, I have an original 10.1 GT-P7510 and had 0 problems with it, other than lag. It's over 2yr old now and battery life is still great and very predictable. The T900 is faster, but also lags big time.. I hate touchwiz
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