Introduction
Tools
- 
                  
                  
- 
            
Try to ensure the battery is drained to below 15%. This reduces the risk of nasty surprises if the battery is damaged during removal.
 
 - 
            
 - 
                  
                  
- 
            
Use a thin card or prying tool to remove the shell of the case.
 - 
            
Take note of the position of the clips, shown in the images. This will help you apply pressure in the right positions around the shell.
 
 - 
            
 - 
                  
                  
- 
            
Apply insulation tape to cover one of the solder points. This helps avoid short circuiting the battery whilst desoldering.
 - 
            
Use isopropyl alcohol to clean the solder pads.
 
 - 
            
 - 
                  
                  
- 
            
Solder the contacts for the new battery in place, ensuring the red and black wires are connected the same way as the old battery.
 - 
            
Once you are satisfied that the new battery is working as intended, re-insert the body of the case into the shell.
 
 -