BATTERIES OF DIFFERENT CAPACITIES

A pool cleaning robot that may include a housing; a power supply cable interface for interfacing with a power supply cable; wherein at least a part of the power supply cable is external to the housing; a power supply control unit, and a wireless charging interface. The power supply control unit may be configured to control (a) a provision of power from the power supply cable to the wireless charging interface; and (b) a provision of power from the wireless charging interface to one or more power consuming elements of the pool cleaning robot