Battery Cell Type: Lithium battery Capacity: 20000mAh (74Wh) Input(Micro USB): 5V 2A Input(Type-C): 5V 2A Output 1(USB-A): 5V 2.1A(Max) Output 2(USB-A): 5V 2.1A(Max) (Attention: The device doesn't support for QC/PEE, but fastest for the rest.)