10 - 30 minuten
My wife's two year old Iphone 4S was unable to maintain a charge, and I figured the only way to set her free was to change the battery. At first I was afraid we would have to get a new phone, but with a little research I discovered that the myth about not being able to change an Iphone battery was untrue.
I first looked on U tube to see how to go about it which was very helpful, that"s where I discovered Ifixit I am so glad I got the tool kit with the pentalobe screwdriver. Being an old guy I soon realized that the two screws that hold the battery connector in place are incredibly small and hard to see or handle with fat shakey fingers. Took me about 20 min. though and no extra parts have been discovered as yet. The best part is the phone worked when I was done albeit I had to charge the battery which was at 35% to begin with.
So here is what I learned. Do this in a well light area with no cats jumping on your work table. If I did this often enough I would invest in the anti-static mat, but I felt that wasn't an issue where I was working. I strongly reccomend a large magnifying glass and a small pair of needlenose pliers to help getting those pesky little clip screws back in. I was trying to use a small plastic tweezer but the needle nose worked out better due to the fact they were magnetic and the screws just jumped on them where I could manipulate them into position with the screwdriver, plus there is less chance of dropping them and losing them.