Method for controlling the battery capacity of a secondary battery in a battery-driven household electrical appliance wherein the battery-driven household electrical appliance has an electrical load and a control means adapted to control the operation of the household electrical appliance and to monitor the capacity of the secondary battery, said method comprising the following steps: - recognizing a situation of storage of the household electrical appliance in which the household electrical appliance is not in use; - determining the current capacity of the secondary battery; - comparing the current capacity of the secondary battery with a desired storage capacity for the electrical household appliance; - activating an energy-consuming load in the electrical household appliance if the current capacity of the secondary battery is higher than the desired storage capacity until the current capacity is equal to the desired storage capacity; - activating an energy saving stand-by mode of the household electrical appliance until the household electrical appliance is used the next time, characterized in that - the control means comprises a microcontroller that is driven in a stand-by mode when the household electrical appliance is not operated, wherein during the stand-by mode the microcontroller is operated in a sleep modus interrupted by operation pulses in the operational modus before activating said energy saving stand-by mode of the household electrical appliance; - a situation of storage of the household electrical appliance is recognized by monitoring the switching off and on of the household electrical appliance and/or the charging of the secondary battery of the household electrical appliance, wherein a situation of storage is assumed when the latest switching off and on and/or the latest charging has not occurred in a defined non-use-period before the current point in time; - activation of said energy-consuming load comprises the activation of a microcontroller of the control means into an operational modus; - activating of said energy saving stand-by mode of the household electrical appliance comprises switching off the microcontroller entirely, such that the household electrical appliance can be switched on only by charging the secondary battery. - recognizing a situation of storage of the household electrical appliance in which the household electrical appliance is not in use; - determining the current capacity of the secondary battery; - comparing the current capacity of the secondary battery with a desired storage capacity for the electrical household appliance; - activating an energy-consuming load in the electrical household appliance if the current capacity of the secondary battery is higher than the desired storage capacity until the current capacity is equal to the desired storage capacity; - activating an energy saving stand-by mode of the household electrical appliance until the household electrical appliance is used the next time, characterized in that - the control means comprises a microcontroller that is driven in a stand-by mode when the household electrical appliance is not operated, wherein during the stand-by mode the microcontroller is operated in a sleep modus interrupted by operation pulses in the operational modus before activating said energy saving stand-by mode of the household electrical appliance; - a situation of storage of the household electrical appliance is recognized by monitoring the switching off and on of the household electrical appliance and/or the charging of the secondary battery of the household electrical appliance, wherein a situation of storage is assumed when the latest switching off and on and/or the latest charging has not occurred in a defined non-use-period before the current point in time; - activation of said energy-consuming load comprises the activation of a microcontroller of the control means into an operational modus; - activating of said energy saving stand-by mode of the household electrical appliance comprises switching off the microcontroller entirely, such that the household electrical appliance can be switched on only by charging the secondary battery.