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iPhone 4s Battery Replacement
Overview: The battery replacement process for the iPhone 4s is nearly identical to the 4.  It involves removing the back cover which then reveals the battery bay.  The back cover is removed by unscrewing 2 pentalobe screws at the base of the iPhone.  The pentalobe screwdriver is a difficult to find tool and can be ordered on our site.  Don't damage, crush or puncture the existing battery to limit the risk of fire.  Follow the video and you'll be successful in the battery replacement process.
 
For additional battery replacement details, check out our battery replacement BLOG!  
    
 
 
4s Battery Replacement Header
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iPhone will not boot and remains at the "red" low battery symbol
Battery capacity has slowly degraded over time
 
iPhone turns off when 10% battery capacity is remaining                                         
Note: Battery and system board heating up during charge and discharge cycles can be either the battery or system board

 

           
 
 
Use a Pentalobe type screwdriver for case opening
                                                                                                       

     
Screw sizes are different for battery connector
 
       

 
 Do NOT puncture the battery.  Use wide tools
to remove battery and prevent puncture.  This
will reduce the risk of fire