I've had my 5c for nearly 3 years now & I was having to charge it 3 or 4 times a day, so I decided to buy a new battery. Initially I was going to pay someone to fit it but I looked at a couple of online tutorials & figured I could manage it myself. However, since fitting it I have a couple of issues. 1) screen is very dark, even on highest brightness setting. 2) battery indicator is always at 100% Now, is this a faulty battery or have I damaged one of the screen connectors when pulling the old battery out (or both)? Thanks!