This is the second identical battery for the same phone that I bought from the same store, as the first one I got had a problem with the + terminal which detached, or rather to be more accurate, it came out of the battery completely, it didn't just come loose. In that case, I could have glued it back onto the contact, probably a manufacturing defect. The second battery has only charged to 100% twice, with whatever cable or charger I have tried, at best it reaches halfway from 40% to 60%, that's the best I've seen. I don't know why it does this, but it seems these particular ones are problematic. I bought two with two different problems. Most likely I will return it since I have the receipt and it has a 6-month warranty, but I have already had it for 2 months. The issue is the hassle of having to go back to the store and the whole process of removing the back cover of the phone again, etc., and I'm afraid the next one might be worse or have some other problem. At least this one charges, even if only halfway.