The invention relates to a charging device (2) for a battery (5) of a motorized device, suitable for being supplied by a single-phase alternating input current, and suitable for being supplied by a multi-phase alternating input current, said charging device (2) including a first conversion module (3) and a second conversion module (4), the first conversion module (3) being suitable for converting an alternating current into at least one intermediate direct current and of supplying the second conversion module (4) with said intermediate current, and the second conversion module (4) being suitable for converting the intermediate current into a direct output current, and of supplying the battery (5) with said output current; the charging device (2) also including a switching module (7) suitable for switching the first conversion module (3) between a first configuration adapted to a first single-phase alternating input current and a second configuration adapted to a multi-phase alternating input current.