5 - 30 Minuten
My battery was losing charge, very quickly, so i changed it out for a new one
The repair was pretty easy, very easy to follow. I wish the video would continue on for at least the part where you connect the new battery to the phone. But overall a good experience.
The forward facing camera stop working, not sure why, but I never use that anyway so it wasnt a big deal.
Phillips #00 Screwdriver
P2 Pentalobe Screwdriver iPhone
iPhone 4 Replacement Battery