While the battery life of the Nintendo 3DS offers a good 3-5 hours of 3D gaming, it seems that the PlayStation Vita has the same battery life.
Revealed at the TGS this year, the PlayStaton Vita offers a good 3-5 hours of battery life when using the system. It is unknown whether the announced battery life includes playing the Vita with the maximum brightness setting, and 3G/Wifi enabled.
Without an option to replace our battery ourselves, all I can say is that… the battery of the PlayStation Vita sucks! I was hoping that the battery life would be better than the Nintendo 3DS.