Milwaukee 48-11-2230 replacement battery provided by AtBatt.com is designed to replace OEM part numbers 48-11-2230, BXL 18. Amstron brand power tool batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original manufacturer specifications. • Chemistry: NiMH • Rating: 18V 2.1Ah • Dimensions (L x W x H): 5.37'' x 3.27'' x 2.74'' • Warranty: 1 Year