5 - 30 minuten
My Iphone was 2 uears old and I was having to charge it almost twice a day.
I first looked up online if it was possible to just buy a battery for my Verizon iphone 4. When I found the iFixit website, I found not only was it possible to purchase, but I could watch a video, download a how to guide, and order all the parts necessary to do the replacement myself. What a delight. I knew I was getting the correct battery too. After receiving everything in my mail a couple of days later, I was able to replace the battery in minutes. No unforseen problems. Even though I backed up my iphone 4 software and applications on Icloud, just in case, I never needed to use the backup. The only difficulty was in how small the little screws were. They were hard to keep track of, but knowing I had two spares sent in the kit sent by iFixit, I wasn't worried if they did get lost. iFixit is the best site hands down. They think from the consumers side all they way through. Very thorough.
Only for other consumers. Go to the iFixit website at https://www.ifixit.com