A charge control circuit, comprising: a power input end; a power output end comprising a first power output end and a second output end and configured to be connected with batteries to charge the batteries; a switch unit comprising a first switch and a second switch and connected between the power input end and the power output end, wherein the first switch and the second switch are controllable by a control unit to close or open to control charging of the batteries with different voltages; and a detection unit connected to the control unit, to detect rated voltages of the batteries and transmit a detection result to the control unit, wherein the batteries are a plurality of rechargeable batteries and at least comprise a first rechargeable battery and a second rechargeable battery; the first power output end is connected to the first rechargeable battery, and the second power output end is connected to the second rechargeable battery; the first switch is connected to the first power output end, and the second switch is connected to the second power output end; characterized in that a voltage adjustment circuit is further connected between the first switch and the first power output end; and wherein the detection unit is configured to detect that the rated voltages of the first rechargeable battery and the second rechargeable battery are not the same and the control unit is configured, in response thereto, to control the second switch to be closed to charge the second rechargeable battery, and at the same time control the first switch to be closed to activate the voltage adjustment circuit for voltage adjustment and charge the first rechargeable battery simultaneously with the second rechargeable battery, wherein the charging currents of the first rechargeable battery and the second rechargeable battery are the same. a power input end; a power output end comprising a first power output end and a second output end and configured to be connected with batteries to charge the batteries; a switch unit comprising a first switch and a second switch and connected between the power input end and the power output end, wherein the first switch and the second switch are controllable by a control unit to close or open to control charging of the batteries with different voltages; and a detection unit connected to the control unit, to detect rated voltages of the batteries and transmit a detection result to the control unit, wherein the batteries are a plurality of rechargeable batteries and at least comprise a first rechargeable battery and a second rechargeable battery; the first power output end is connected to the first rechargeable battery, and the second power output end is connected to the second rechargeable battery; the first switch is connected to the first power output end, and the second switch is connected to the second power output end; characterized in that a voltage adjustment circuit is further connected between the first switch and the first power output end; and wherein the detection unit is configured to detect that the rated voltages of the first rechargeable battery and the second rechargeable battery are not the same and the control unit is configured, in response thereto, to control the second switch to be closed to charge the second rechargeable battery, and at the same time control the first switch to be closed to activate the voltage adjustment circuit for voltage adjustment and charge the first rechargeable battery simultaneously with the second rechargeable battery, wherein the charging currents of the first rechargeable battery and the second rechargeable battery are the same.