COMPATIBILITY: This battery only fits for Redmi K20 and Xiaomi Mi 9T. Please carefully confirm your phone model before purchase. Battery model: BP41, For Redmi K20 and Xiaomi Mi 9T Battery support up to 800 charging cycles, built with high quality battery cell. Included Toolkit: The battery comes with all the tools you need for repairing, helps you to complete the repair process effortlessly. Step-by-step Instruction: we provide a vivid instruction manual to show you how to disassemble your device and replace the battery by yourself, you'll find it would be an easy task for you with this guide manual. Friendly Support: You can reach out to us whenever you have any questions or need any help, our specialists will be glad to assit you anytime. GREEN FUSION Only for Mi 9T Replacement Battery, BP41 Battery for Redmi K20 and Xiaomi Mi 9T, 4000mAh, with Installation Instruction & Repair Toolkit