Sony has finally come clean with the details
concerning the PSP's battery life. We'll just keep this short n' simple <wink>... the lithium-ion battery
will provide 4-6 hours for games, and 4-5 hours for videos. According to Sony, these ranges were obtained by
adjusting the PSP's luminance from max to min, while the volume was set at mid-level with headphones plugged in, and no
wireless LAN connection made (presumably, LAN play will eat up the battery faster). At any rate, a spare battery
can be picked up for an extra $45, which definitely seems like a viable option.
Engadget
TUAW