Introduction
Prereq only for battery removal when replacing the rear case.
Tools
- 
                  
                  - 
            Use a pair of tweezers with blunt tips to peel back the other adhesive strip on the lower edge of the battery. 
 
- 
            
- 
                  
                  - 
            Slowly pull one battery adhesive tab away from the battery, toward the bottom of the iPhone. 
- 
            Pull steadily, maintaining constant tension on the strip until it slips out from between the battery and the rear case. For best results, pull the strip at a 60º angle or less. 
 
- 
            
- 
                  
                  - 
            Repeat the previous step for the second strip. 
- 
            If you removed both adhesive strips successfully, skip the next step. 
- 
            Otherwise, if either of the adhesive strips broke off underneath the battery and could not be retrieved, continue with the next step below. 
 
- 
            
- 
                  
                  - 
            Prepare an iOpener and apply it to the back of the rear case, directly over the battery. Alternatively, you can apply heat using a heat gun or hair dryer. 
- 
            After about a minute, remove the iOpener, flip the phone over and use a plastic card to break up any remaining adhesive behind the battery. 
 
- 
            
To reassemble your device, follow these instructions in reverse order.