Aaron, again, no idea on the specs, it is a stock replacement battery. It should last just as long as when the phone was new. I got mine right when the 3GS came out: June 2009 so ya about 18 months ago and the battery couldn't hold shit for charge. I already noticed the difference, I've used 15% battery life over the last 10 hours instead of like 50%. Call him up and make an appointment, this is what you want so you can love your phone again
