20 - 30 Minuten
The batter would not hold a charge, phone would die at 90%. Started slowly at 30ish and went up to that by the time I changed it.
Fairly easy 2 hardest parts were getting the logic board back in place and one of the ribbon connectors
I set out a paper towel and drew the iphone on it to make sure I had the right screws in the right position helped keeping the different screw sizes in order.