VEHICLE CONTROL UNIT AND VEHICLE CONTROL SYSTEM

A vehicle control unit includes a control unit connectable to a first power supply line of a vehicle, a load connectable to the control unit, a detachable internal rechargeable battery, and a housing configured to accommodate the control unit and the internal rechargeable battery therein. The control unit is configured to selectively supply, to the load, one of first power-supply electric power supplied from the first power supply line and second power-supply electric power supplied from the internal rechargeable battery according to a situation.