Me too... unplugged but shows charging, and always self-turn on to show charging without being plugged in. I found this happens when my battery is 100% fully charged. let my nexus 7 gen2 4G drain a while till charge goes down to <90%, it stops. I replaced its power board with the USB port, didn't work. Don't know where it come from. Still using this big phone, I love it anyway. I claim this is the best of the best pad ever made on this earth. Don't understand why those $@$*-head stopped the Nexus line.