They battery isn't exactly an accessory. The contacts have to line up w/ the board inside the phone.
I bought this battery and it didn't work out for me. The battery caused restarts of the phone every 3-5 minutes. Then when taking it out to put the stock battery back on, I accidently broke the camera. So be careful.I bought this 1600 mah battery for my iPhone 3G
I have not received it yet but when I do I'll install third party software along with the battery and I'll do testing on it for about a week
Then I'll up date this post and let you guys know the Result's
I'm exspexding about any ware from 1-2hours more battery life then the Original I shod have this battery by the 23rd and if you are wondering how much I paid for it under $3.00 us Dollars on eBay Straight from the source china. I'm starting to wonder if the battery well make my iPhone go boom lol
I'll let you guys know