The FinePower OneBase XB40 OneBase12 battery with an output voltage of 12 V is designed for use with FinePower drill-drivers. The power source has a capacity of 4 Ah. Lithium-ion technology ensures stable autonomous operation of the tool and eliminates the memory effect. The FinePower OneBase XB40 OneBase12 battery is designed as a stick-type pack. The latch-button locking mechanism ensures convenient installation and secure fixation of the battery pack into the base of the tool handle.