5 - 30 minutos
I had my iPhone 4 for 13 months and the Battery was no longer holding its charge. I was constantly charging my phone. I wanted a new battery.
The repair was really easy overall. The hardest part was putting the screw back in the slot to hold the battery. The screw is very very small. But I finally got it back in.
Have a magnifying glass. I am really glad I made this update.