i dont own the ac adapter... i just used radioshacks while i was there... (i know the manager

)
im going to try and borrow a friends ac adapter tomorrow. i think if that works in psp getting power w/out the battery in then i know 100% its the battery thats crap. if thats the case where should I buy my battery from? I see all kinds of batteries w/ different mAh and whatnot. What is the best battery? I do NOT want pandoras battery. i really dont want to hack my psp at this point in time... right now i just wanna get it working! maybe later...
where should i buy my battery? which battery spedifically... i dont want to buy another generic one and it suck either....
thanks