i was thinking that with the new Battery coming out for psp that is going to last 2 times longer than the old one for 50-70$ that the new games coming out for the psp will play at 333mhz for better game play and fx

or like this battery i found also

http://us.codejunkies.com/shop/product.asp?c=US&cr=USD&cs=$&r=0&l=1&ProdID=701