Not a bad result actually.
A guy from NeoGAF forums made PS Vita’s battery test and the results are quite better than expected. The device lasted 4 hours and 29 minutes of gameplay. For comparison, majority of today’s laptops can only last a couple of hours of intense usage, smartphones can’t live any longer than a few hours of 3D gaming too.
Settings that were kept on test:
3G – on
WiFi – on
Bluetooth – off
Brightness – Maximum
NEAR auto updates – on
Headphones volume – 50%
Game – Ultimate Marvel vs Capcom 3

Pretty long
On the top : "Follow us on Twiiter" Not Twiiter, but Twitter. Dah….
Goddamit, this was here for a half of the year and I haven't noticed x_x
Thanks for telling