Sony's extended life PSP battery
Sony's "Stamina" battery pack for the PSP is now available for power hungry gamers everywhere.
As a 2200 mAh battery (versus the 1800 mAh of the original), it stuffs 20% more power into a package that is exactly the same size as the original. While your PSP's power consumption is dictated by several factors, you're likely looking at an extra 45 to 60 minutes of playtime with the new battery.
It carries a MSRP of $39.99 and is available from most PSP retailers, including Lik-Sang (though they list it for considerably more).