Charge it in the evening, takes about 2hours for a full charge. The charge lat for a long long tome, even if your running several different applications. My daughter plays a ton of games on my tablet and she is 6. Its afreat sysytem. I recommend it for anyone
I use the tablet a lot all day. Always charge at night, if I use it constantly I may need a day charge 1 hr give me a half charge approx 5 hrs, 2 hrs give a full charge approx 10 hrs. Now watching movies does use the battery a bit faster. I love this tablet.
If your OS is 4.0 when your tablet arrives, it is a simple process to update to JB. Just go to your Settings, select your system information to see what OS you have, then select 'update'. The tablet will update itself, but you may have to reboot after the installation.