iPhone 8 Plus Battery Case, Tiitarn 4000mAh Ultra Slim Protective Charging Case Lightning Port Portable Charger Case 5.5" for Apple iPhone 8 Plus/7 Plus/6s Plus /6 Plus

Note: 1. When charging the battery case with phone attached, the phone battery will be charged first. After the phone battery is fully charged, charging of the battery case will begin. 2. When charging the battery case with phone attached, data transfer is supported. To charge and transfer data simultaneously, simply connect the battery case to your computer's USB port. Warnings: 1. Do not expose this battery case to moisture or submerge it in liquid. Keep battery dry all the time. 2. Do not attempt to charge battery case using any method, apparatus, or connection other than the device's USB connector. 3. Do not attempt to replace any part of this battery. 4. Due to the high output power, when charging the battery case's surface gradually becomes warm. This is normal. 5. Due to the classic ultra-thin design, when using the battery case, please remove the phone's other protected case.