For Milwaukee 18V Battery. Compatible with Milwaukee 18V lithium-ion batteries such as 48-11-1812, 48-11-1815, 48-11-1820, 48-11-1828, 48-11-1835. 1x Electric Ratchet Wrench（battery not included）. And the on-board battery electric displays will let you know how much power you have left.
eBay