Note: 1: 1. The instruction manual may lead to errors as it does not clearly describe the details. For easier battery replacement, we strongly recommend that you watch the relevant YouTube video on battery replacement before you start. 2. Discharge the battery to less than 20% before starting. A fully charged lithium polymer battery can catch fire and/or explode if accidentally struck. 3. 3. When you first start using the battery, the battery will drain quickly due to the instability of the lithium polymer in the new battery, which will become normal after a long period of use. To extend the battery life, drain the battery until the phone turns off automatically, then recharge it for 10 hours, and repeat this 3-5 times for optimal battery use. Product Type Lithium Polymer Voltage: 4.4 volts Capacity: 3000mAh / 55Wh Color: Blue