the battery was working for 1-2 weeks, after the battery level charge start to go down so quickly: 2, 3 hours of use and it pass from 100% to 0% with just mobile date on and Bluetooth on, I've tried to communicate with the seller and I've explained the problem, but he didn't answer back, never.
Very good battery, I'm happy with this purchase. It hold charge even a little better than my original one when it was new. I just seriously doubt the advertised extended capacity!