I charged my Tablet for 4 Hours as Directed, when I went online the Battery did not last long, it is supposed to last 3- 5 hrs Continuously use after 1 hour it was on the last Bar of the Battery.
You need to check various factors which affect battery life:
1. Wifi (turn it off)
2. Bluetooh (turn it off)
3. Running background application (close it)