Hey I want to know why 2000 MaH's suck so much lol. I have 20 rechargeable AA for my GP2X, 12 Rayovac 2000 mah, 4 Duracell 2100, and 4 Rayovac 2500's. On the 2000 and 2100 Mah's I get like 30min to 1 hour, but on the 2500's I get like 4-6 Hours. OMG, that 500 extra MaH makes all the difference...