[Lower Interface Compatible with for DeWalt 20V Li-ion Battery] The battery adapter's lower interface is compatible with for DeWalt 18V/20V/60V Lithium ion batteries, such as DCB200, DCB120, DCB201, DCB203, DCB204, DCB206, DCB102, DCB104, DCB118, DCB115, etc. [Lower Interface Also Compatible with for Milwaukee 18V Li-ion Battery] Our battery converter's lower interface is compatible with for Milwaukee M18 18V Lithium ion batteries, such as 48-11-1815, 48-11-1820, 48-11-1840, 48-11-1850, 48-11-1860, etc. [Upper Interface Only fits for DeWalt 12V/14.4V Nicad & Nimh Power Tools] The DM20DC12 adapter's upper interface is only compatible with DeWalt 12V NICAD&NIMH Power tools. [Convert 18V/20V Lithium to 12V/14.4V Nicad&Nimh] The adapter can convert for Dewalt 18V/20V and for milwaukee 18v lithium ion battery to replace for dewalt 12V/14.4V nicad&nimh battery, and then work with for dewalt 12V/14.4V nicad&nimh power tools. [Attention Please] Our package only includes 1pcs of adapter, battery and tools are not included. And if you want to charge your battery, please take the adapter off and then use a professional charger to charge. Colour:Black Material:ABS Package Contents: 1 * Battery Adapter (battery and tool are not included)