Not all batteries are the same.
I bought this hoping that it was the same configuration as the original "fat" psp batteries, unfortunately this one was made in Japan. The original batteries, that are used to "repair" your psp's for customization, are made in China. This will not work with Pandora. Be sure to get one that was made in China!

Great back-up for Long Trips!
Was playing Final Fantasy II on a long drive to Virginia. Halfway through the trip, the battery was going dead. Lucky for me, I had just purchased a new PSP Battery, and charged it before leaving. I saved my game, slaped in the new battery, and continued my game. It's a good idea to have a spare, as my PSP was bought the day it came out, and all the recharging on the old battery has started to wear it down, and the charges don't last as long.

Great Product
it's great as a back up. the lifeware on the battery isn't as good as the the one that came with it. but otherwise it's still good wenough to have a decent amount of play life. i recommend it as a back-up battery.

A Must-Have
If you have a PSP, you know that the battery life isn't that much. If you plan on going on long trips, get the car adaptor, but if you plan on going camping or hiking, I suggest buying 1 or even 2 of these. They are an investment, but if you have the money this is a good investment.