15 minuten - 1 uur
My iPhone needed to be charged 3 times a day.
I was very nervous and worried that I was going to break my phone, but I followed the video here and also a video on YouTube that provided better angles. Everything went pretty perfectly. Because I was so nervous it took me about an hour. It works great now!
My advice would be that the things you pop off are like little clips and they snap back into place. Also, I dropped a screw off the screw driver and almost lost it forever, so be careful! Maybe work over a towel or get one of those magnetic mats. Move slow and carefully. Also, it's very hard to pry the screen and battery out. I really had to jam that plastic piece under the battery to get it out. I wish the video showed you how to really get in there.