my N7 gen 2 ,runiung great for 5-6 months, started doing this about Mar 4, Battery Doctor showed one game with 53 % batt drain Did Wifi offf, location off, uninstalled some recent apps. Powered off, restarted okay...Usage went down slightly (3/7) Wicked fast drain today, doesn't want to take a full charge. won't reboot, cant get into bootloader using Vol down and Pwr buttons together. I am aware that other users have batteryport connection problems also. (Sun).Went to total batt drain overnight , plugged in charger(icharger works, shows charging my phone), waited ten mins, trying to turn on only indication is light at bottom blinks 5x, ..can charge slightly by manipulating port connection, watching battery settings..either hold conenction or lay N7 on a pencil elevating port and placing book on cable ...it charges a few percentages then shuts stops........ dissapointing
(Mon) just realized it has wireless charge capabilities..(3/10) ordered wireless charger online
Wed 3/19 wireless charger work great.. found one game (even after force stop)show a goodly amount of usage..must have background apps in it.