How to do a complete backup before battery replacement?

Hello Jeffery,

I see your question. A battery replacement does not hinder with the data but if there is an improper repair then your data could be lost.

Steps to back up to computer.

1. Download iTunes if you do not have it already
2. Connect the phone to your computer using a USB to 30-pin (Which is the port on the bottom of your phone)
3. On iTunes click the phone icon
4. There will be a backup option
5. Hopefully this advice will help you. If there are any issues do not hesitate to just comment and I will help you fix it.

Happy Fixing!

-Javen Rahemtulla