Abstract: A portable power bank includes a main body, a charging slot, a back plate, and a charging module. The charging slot is at the back surface of the main body. The charging slot has an accommodating space for receiving an electronic product. The back plate is pivotally connected to the back surface and is movable between a first position and a second position. A first angle is between the back plate at the first position and the back surface, and the back plate at the second position is received on the back surface. The output terminal of the charging module is at the surrounding wall for charging the electronic product. The conversion circuit of the charging module is for converting electricity from the input terminal and outputting to the battery or the output terminal, and converting electricity stored in the battery and outputting to the output terminal.