[quote name='Access_Denied']$50?!?!?! Try $20, new. You can get a used PSP battery for $10. Quite a few CAGs have some on their trade list.[/quote]
Well I checked Best Buy and the 2200 one was about $40.
I hear that getting a used PSP Battery is not the best idea, since it may be worn out. Thus instead of lasting a few hours, it may only last 20 mins or 45 mins etc, depending on how much it has been worn out.