Warning: Please refer to some professional maintenance website or Youtube. Noted: If a battery message pop-up in the setting menu, don't worry! Please remember that except your original battery, all the replacement battery will get this message. ?High-Efficiency?: The smart IC chip-set makes the battery energy conversion more efficient, it means that when you play games, the increase in battery temperature will slow down, keeping your phone running smoothly. ?Safety First?: This battery used the Ti protection board solution (same as original), which is safer than orther protection board and could effectively prevent the occurrence of safety hazards such as fires and explosions. ?High Capacity?: This battery replacement for iPhone 11 has a high capacity of 7000mAh, high-capacity batteries can reduce the number of times of charging, allowing your phone to work longer. ?Compatibility?: for iPhone 11 (Models: A1984,A2105,A2106 ), not for iPhone 11 Pro and 11 Pro Max.