Overview The powerbank has NTC temperature protection sensors that can detect when temperatures get too high. After a certain period of fast charging, they turn into trickle charging to prevent overcharge by detecting the battery temperature according to the resistance value. Also compatible with Fast charging Huawei/ Xiaomi/ Samsung devices. Compatible with Apple 13 Series & applicable to Apple 8-14 charging series. Specifications Battery Type: Polymer lithium battery Capacity: 20000m Ah Rated Capacity: 5800m Ah (5V/3A), 12000m Ah (5V/3A), 18000m Ah (5V/3A) Energy Conversion rate: â¥75% Micro Input: 5V/2A Type-C Input: 5V/3A Type-C Output: 5V/3A USB1/USB2 Output: 5V/3A Total Output: 5V/3A Max