5 - 30 Minuten
The battery life on my iPhone 4 just kept getting shorter and shorter. Had to charge it Twice a day.
Man O Man what a breeze to replace the battery. I always thought it would be a huge job since everyone said you had to return the phone to apple to have it replaced.
Got my order lightning fast, poped the tamper resistant screws out, slid the back off and swaped the battery. Man how easy could it have been. Thanks for the parts and information. It only took me about 20 min.
Don't pay to have someone do it. Anyone can do it with I fixit.