A method and a pool cleaning robot that may include (i) a turbine that is at least partially disposed within a fluid path of the robot to extract energy from flow of fluid through the fluid path； (ii) an electrical generator for providing electrical power thereto and adapted to be driven by the turbine； (iii) a rechargeable power source arranged to be charged by the electrical generator, and (iv) a controller that is arranged to direct the pool cleaning robot to be positioned in a certain location in which a flow level of fluid that is circulated by a pool fluid circulation system is higher than a flow level of the fluid within a majority of the pool, wherein when positioned at the certain location the fluid that is circulated by the pool fluid circulation system passes through the fluid path.
