Abstract: A mobile power supply rental device includes a host and at least one charging cabinet unit. The at least one charging cabinet unit includes battery compartments configured to receive mobile power supplies, charging terminals configured to charging the mobile power supplies received in the battery compartments, a power input terminal, a power output terminal configured to output the current, and a circuit board electrically connected between the power input terminal and the charging terminals. The power input terminal is configured to input current. The power output terminal is configured to output the current. The host is detachably stacked on the at least one charging cabinet unit, and/or when multiple charging cabinet units are provided, each of the charging cabinet units are detachably stacked on an adjacent charging cabinet unit.