The description of this item would lead one to believe that this battery will fit the entire 7100 series of blackberrys. This is not true. It will not fit, nor even be recognized, by a 7100i for instance. It is not a true cs-2 battery and it's rating is 200mhm below the standard lithium ion battery for most blackberrys. It's a good price and and a shoddy battery. I have returned mine.