The iPhone Battery has two parts namely 1. Battery Cells: Stores the Charge. 2. BMS(Battery Management System): It manages other functionalities like Power cuts when Fully Charged, Low Power Mode, and Discharging slowly when the Charge goes below 20%. All the iPhone Batteries come from the same Manufacturers(mainly two), hence these Batteries are Genuine, Authentic, and Original. If you are purchasing iPhone Battery for iPhone models XR-14 series, it won't display Battery Health and flash warning "Non-Genuine Part". Please Note: 1. Battery Replacement is recommended once the Battery Health falls below 80% or the Battery Cycle Count clocks over 500 counts. 2. For iPhone 11, all the Batteries are locked by the Manufacturer i.e., the Battery is also paired to the Logic Board like the Face ID Module, giving 3rd Party repair a tough time. Even if you swap the Batteries of two iPhones(same model), the problem still persists. 3. The batteries are Original and from the same Manufacturers, they won't display the Battery Health and flash warning "Non-Genuine Part". 4. The problem can be fixed by swapping the BMS of the Old Battery to the new one and then welding the BMS(Old Battery) and Battery Cell(New Battery), after that you need the programmer to tune the Health of the Battery, all the way up to 100%. 5. Even without swapping the BMS, it will function normally and will give the same backup as the Original without any disruptions. 6. No Freebies or Repair Tools will be provided. The Battery Adhesive Strip will either be attached to the back of the Battery or will be sent separately with every Battery.