Metabo 6.25489.00 Lithium-Ion (Li-Ion) 2200mAh 25.2V rechargeable battery

Battery pack 25.2 V, 2.2 Ah, Li-Ion, "AIR COOLED" Capacity indication: the remaining capacity can be queried by the push of a button.
Excess temperature warning: If the critical temperature is reached, the electronic unit seals off the battery pack. Gentle cooling to operating temperature by AIR COOLED chargers recommended.
Overload warning: if power consumption is too high, the electronic unit seals off the battery pack. Overload protection for battery pack and device.
Automatic warning at low temperature: flashing signal on the battery pack indicates low remaining capacity.