Okay, my brother KILLED my Samsung Galaxy Tab 3's battery and before he left he didn't put it on the charger. When I plug it in when its off the screen keeps flashing and the little battery symbol that it's charging while off appears, but then after a few moments, it goes away and it stops charging.
I have also tried keeping it plugged in and turning it on, and it will stay on for a minute or two and then shut off, even if the charger is still plugged in. Other times it will just turn on with it charging and everything, and then immediately shut off.
I don't use the charger that was given to me, but I have had NO PROBLEMS with this charger before. My tablet is only 2 or 3 months old, so its fairly new.
Read more: Samsung Galaxy Tab 3 won't charge and won't stay on?