Charge compensation circuit which can be activated

The circuit (1) has a zener diode (5) and a resistor (6) which are arranged in parallel to a battery cell (10). Interruptible connections (4) of manual actuatable switch and automatically closable switch are connected with battery cell respectively. The interruptible connection is connected to a charge state sensor. The interruptible connection of manual actuatable switch and automatically closable switch is operated, when charge state of battery cell is above the threshold value. A compensating circuit module is connected to battery cell through plug connections.