there are several battery and plugging devices, MyBattery is the most interesting though.
it s a big battery (250grams), you can put it in your pocket, but with a "dead" PSP battery it allows up to 18H30minutes of gameplay.
http://watch.impress.co.jp/game/docs/20050217/ggl.htm
it s a bit pricy though, about 8000yens,$76
it s a big battery (250grams), you can put it in your pocket, but with a "dead" PSP battery it allows up to 18H30minutes of gameplay.
http://watch.impress.co.jp/game/docs/20050217/ggl.htm
it s a bit pricy though, about 8000yens,$76