10 - 30 minuten
As widely documented, after two years my iPhone battery life was noticeably diminished. After following a lot of guidance on improving battery performance through closing apps and limiting notification and location services, I still wasn't satisfied with battery life so I looked into the options for replacement.
The repair kit from iFixit was top notch - I watched a video demonstration and although I have little electronic repair experience it went fine. I could not believe how tiny some of the screws were and was worried I could not replace them but with a pair of tweezers and some patience I was able to position them and get it done. It took abut 20 minutes - just as predicted. There was one very tricky thing with the antenna but I was able to do that fine.
I am a little disappointed with the new battery. Although there is no real objective way to measure this, I don't sense I am getting the significantly extended battery life compared to my original battery. I thought the battery from iFixit was new - maybe it was reconditioned? If I had to do it again, I would take more care to be sure I was getting a truly NEW battery.