iFixit Battery Compatible with iPhone 6s - Repair Kit
 
Product Features
  

         
This replacement battery is what you need to bring that dead smartphone back to life. The Fix Kit includes everything you need to swap in a new replacement battery.
         
This battery is brand new! Each battery is confirmed that there are no cycles on the cell and that the capacity is 95% or higher.
         
Fix Kit includes all tools and adhesive needed for a successful DIY repair.
         
Covered by iFixit's 1-Year Warranty.