20 - 30 minutos
The original battery was not holding a charge for as long as it should, so I decided to try and replace it myself.
The first battery I got was defective, but ifixit replaced it quickly and the second battery works with no problems. The guide was easy to follow (especially since this was the first time I had taken apart an iPhone).
This is definitely something a person can do themselves, even if they are not the type of person who likes taking apart technology.