Mobile power supply

The utility model relates to a mobile power supply. The mobile power supply comprises a shell, a battery cell module and a circuit board, the battery cell module and the circuit board are accommodatedin the shell, the battery cell module comprises a battery cell, a heat conduction box and a connecting piece, the connecting piece covers the heat conduction box and forms an accommodating cavity with the heat conduction box, the battery cell is accommodated in the accommodating cavity, and the circuit board is electrically connected with the battery cell module. When the mobile power supply is used, the battery is charged; and if the battery cell is abnormal and has a combustion risk, the heat conduction box can accelerate the heat dissipation of the battery cell, and the battery cell is accommodated in the accommodating cavity and is approximately sealed, so that the battery cell cannot be severely combusted due to insufficient oxygen supply at the initial stage of abnormal combustion of the battery cell, and t