METABO 18V 52AH LITHIUM ION BATTERY PACK Ultra M technology Intelligent battery management for longlasting battery packs with a 3 year manufacturer&39s pguarantee Patented &ldquo AIR COOLED&ldquo charging technology Permanent Electronic Single Cell Protection ESCP when charging for particularly long life Processorcontrolled charge & discharge management Capacity display with almost no selfdischarge No memory effect Capacity display with almost no selfdischarge Battery pack voltage 18 V Capacity of battery pack 52 Ah Quantity 1