12V Battery,Highly efficient lithium-ion battery,Cell Balancing � Longer battery life, extended battery life,Greater battery resources thanks to evenly loaded cells,Makes the most of charging potential,Compatible with all PARKSIDE X 12 V Team series devices,Battery type: Lithium-ion,Capacity: 4000mAh,Material Housing: polyamide, glass fiber (PA6 GF30), TPE,Size: 9 x 6.8 x 10.5cm