BRAND NEW Replacement Rechargeable battery, works as genuine parts, 100% OEM Compatible!.For MILWAUKEE M18 Cordless LITHIUM-ION System Tools.For Milwaukee 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1828 , 48-11-1840, 48-11-1841, 48-11-1850, 48-11-1852, 48-59-181, 48-59-1850.ABOUT US: We have been manufacturing the battery and charger for 12 years. And We Promise the Quality for Customer. Buy with confidence! Direct from Manufacturer. High performance. Affordable price!.WARRANTY AND SERVICE: If You Do Not Like our Product or Don't Want It For Any Reason, We Will Happily Accept The Return and Give You Your Money Back. No Questions Asked. 30 Days Money Back Guarantee - and 12 Months Replacement. SERVICE: Email Support Available 24 Hours a Day, 7 Days a Week.