The invention relates to a battery-powered device, comprising a first controller, a first battery interface, and at least one electric consumer, wherein the first battery interface is configured to receive at least one configurable rechargeable battery pack for supplying energy to the at least one electric consumer; and wherein the first controller is embodied to receive at least one battery charging parameter at the first battery interface, and to reconfigure the at least one battery charging parameter by means of the first battery interface according to the power demands of the at least one electric consumer or according to a given user-specification.