15 minutes - 1 hour
The family has six iPhone 5's and each one had at least one problem that needed repair. I could have gone to the Apple store and waited weeks, or one of those mall kiosks and paid someone to do the repairs. But I can't wait that long and don't want to pay someone else for something I can do myself, and probably better.
I had to replace three batteries which had puffed and popped out the phone's screen and three others because they wouldn't last the day, as well as three power and audio control button cables because the power button stopped working, and a cracked screen. It took a few hours to do all the repairs, but every one was a success and all of the phones are as good as new.
I worked at the kitchen table, a nice big area with good lighting, and placed a clean white t-shirt down as my work surface. The t-shirt kept screws from rolling around provided some cushioning to the work surface. It even made it easy to find a wayward screw when the screw driver slipped from my hand and sent one flying. I also used a magnifying visor to make life easier on the eyes. Like I said, it killed a few hours to do all the repairs but the money saved was well worth it.