4 Wh high power 20000mAh suitable for air travel. Type-C 50W MAX Charges the Mi 11 to 100% in 44 minutes. Can charge three devices simultaneously Compatible with smartphones, tablets and the Nintendo Switch. Charges laptops Supports type-C laptop charging. Type-C two-way fast charging Fully charged in 4.5 hours. Supports low-current charging Able to charge devices such as Bluetooth earbuds and smart bands. Can charge three devices simultaneously, compatible with smartphones, tablets and the Nintendo Switch Able to charge three devices simultaneously with one type-C port and two USB-A ports. When used alone, the type-C port is able to sustain high-power usage of devices including Mi Notebooks and MacBooks. Easy-to-use low-current charging USB-A ports can charge low-current devices such as Bluetooth earbuds and Mi smart bands*. An effortless solution to your everyday low-current charging needs. No time wasted when charging the power bank, the type-C port supports two-way fast charging With 45W MAX input capacity, the type-C port supports two-way fast charging and the E-Marker charging cable in the package supports high currents of up to 5A*. When used together the power bank can be charged to 100% in 4.5 hours Improved safety with high-quality IC chips High-precision capacitance and inductance sensors, plus advanced circuit chips mean added safety, an upgraded conversion rate and discharging voltage stability. Peace of mind for your everyday charging with multiple circuit protections.