[Advantages of 2 in 1 Battery Adapter]2 in 1 Battery Adapter is convert for 2pscks 18V batteries to work for 20V cordless power tools(Not for NICD 18V tool).Two batteries Double power and double battery capacity work simultaneously on your power tools, higher powerful and longer working time,more efficient on the power tool. [Compatible for 18V Battery]The battery adapter compatible with 48-11-1862 48-59-1880 48-11-1852 48-11-1820 48-11-1822 48-11-1828 48-11-1840 48-11-1841 48-11-1850 48-11-1815 48-11-1812 48-11-1811 48-11-1860 48-11-1890 48-11-10 batteries, etc.(Battery not included) [Use for 20V cordless power tools]Converter top: Compatible with for DeWaltDCB series 18V/20V MAX lithium battery power tools;replace for 20V max Lithium DCB208 DCB207 DCB201 , etc Battery.Converter top interface use for 20V Cordless Power Tools.2packs battery work on your power tool at the same time,Double power on tool working.And let you Enjoy the benefits of extended run-time of Li-Ion Batteries on your existing 18V tools. [Safety Protection ]: The 2 in 1 Battery adapter has a built-in replaceable safety and a smart identification chip, which can cut off the current in time to prevent the product from overcurrent, overvoltage and short circuit protection and your device. Color: Black Material: plastic Package Contents: 1 x 2 in 1 Battery Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.