Description: *This adapter can make listed lithium batteries use for MILWAUKEE 18V lithium cordless power tools, and let you Enjoy the benefits of extended run-time of Li-Ion Batteries on your existing 18V tools. *Maximum initial battery voltage(measured without a workload) is 20volts, Nominal voltage is 18volts. Notice: 1.Allows for use of 18V LITHIUM batteries and replacement batteries in most batteries for MAKITA: BL1860B/BL1860/BL1850B/BL1850/BL1840/BL1830B/BL1830/BL1820/BL1815,etc. 2.Use for MILWAUKEE 18V lithium cordless power tools. 3.Can not be used for power tool battery charging, this adapter will not fit into any chargers. If you need to charge your power tool batteries, please use the original battery chargers. Instruction guide: 1.Inert battery into battery adapter(arrow direction) properly and insure battery safety button fit to adapter properly. 2.Inert battery adapter with battery to tool(arrow direction) properly and insure adapter safety button fit to tool properly, then start to use tool. Package Contents: 1 x MT20ML Battery adapter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.