I was a little surprised to install this battery because it was practically empty, these batteries should only be stored fully charged. First load ... the next day, the battery was very low. After the 3rd load, the battery finally it behaves normally, with a discharge rate equivalent to the original. We will see its lifespan. For novices in repairs, battery connector is very fragile if you unclip evil, it may desoldering and it will be difficult to repair; look how on large parts of sites of iPhones, they all have a video detailing this manipulation. @ +