Which battery should I buy for my PSP?

[wangjingwanjia]

Thanks guys, I went to the local game shop but they didn't have any better batteries, only the 1200mAh, but they had an "emergency recharger" thing that I put on the outside of the PSP, 2400mAh, so I bought that one.

Also I ordered two real batteries from the web, one was 2400mAh(copy/no-brand) and the other one was a 1800mAh(Sony), which I think is the PSP-1000 battery.

So I will try them out and see if they are any good or better than my original.