work grear in Phat PSP, cant in Slim PSP
great lasting life in Phat, but Slim PSP refuse to work.
Thats what u get with 3rd party

Not what I expected
OK so only charged and flattened once. Maybe improves with age?
Compared to my Sony 1800(2yrs old) my Sony 1800 still had 30% charge left when this one died. Charge time was roughly the same. No problem fitting in PSP so maybe they fixed that problem. Not impressed but at a 3rd of the official price can't complain TOO much! Get what you pay for?

Worst Piece of Shizzle... Ever
...for the PSP. I ordered one and it broke down on me after a few charges. Waste of 13 bucks. You're better off buy SONY products. Yeah the battery can work longer but it does kinda glitch out the power bar on your PSP, and even when it could say it is fully charged... BAM "Low Batt" screen and your data is gone :)

Really funky battery
Just got it recently and gave it a test run. Simply played some gundam seed, 333mhz till the battery "died". The running time compared to the stock battery is hardly different at all, maybe half an hour more. The psp also seems to have difficulty gauging how much power is actually left. It does seem to charge exceptionally quick, as a previous commenter stated, the battery shoots from dead to 50% in roughly 10 minutes, but after that it will charge like the sony battery itself, snails pace. Just go for the Sony brand.

great battery
I'll give it 4 stars because mine lasts seven hours on max brightness, there's a way to get the 4th brightness without it being plugged into the wall...and still seven hours.

What I don't understand is you guys who say the battery doesn't fit O.o...it fits fine! it's just a tad bigger than the crappy stock, but hey it's better! Trust me 15 bucks for this is a lot better than the stock.