IMPORTANT NOTE: 1. Please confirm your device model at the back of your device before placing an order. 2. To reach optimal performance, please use the original charger or use big current charger to charge the battery. 3. To extend battery life, drain the battery, then recharge to 100% for one hour, and repeat this 3-5 times for optimal battery use. 4. If your device has the battery indicate issue after install our battery, please try again firmly press the battery connector, make sure it connect perfectly, then reboot your device, the battery indicator will work correctly. 5. The most important and difficult part is removing the battery by removing the sticky flexible tape without damaging the old battery, make sure to heat-up the device at the back with a hairdryer to make it flexible. 6. If you don't know how to replace the battery, it is highly recommended that you follow the steps to install it after watching the related video on Youtube. As the installation video is for reference only, the tools in the video may be different from our