1. iPhone from
2. Loosen the two screws on the connector
Push up 2. Back Cover
3. Loosen the screw at the Battery
4. Battery raus, new purely
5. Assemble
Time: 5-10 min.
The whole was at an iPhone 4 durchgeführt.Problem sporadic restarts were no matter how full the battery is.
A great thing, the set and can be recycled.