15 minutes - 1 heure
About a month previous my iPhone was shutting down at 20, then 30, then 50%! Researching, it turns out that was my battery saying that it wanted to rage (slightly) against the coming of the night.
The guide was clear and the install was easy.
The guide says the battery my be hard to remove. Naw. It is impressive whatever they use to adhere to that thing to the back case. If you can't easily remove it, don't feel bad. Be careful, but Exert consisting pressure. My battery deformed by the end of it.
I used the kit box to separate the different sets of screws and labeled them and it made assembly much easier.