Battery Adapter for 18V Tools, 20V - DEWALT
Compatible with most DEWALT 18V tools and allows for use of 20V MAX compact batteries
Requires use of DEWALT 20V MAX charger
Use with DCB201, DCB203, DCB203BT compact batteries
Terribly hard to take off after use. On a positive note to that though is that it doesn't wiggle around at all.... For some reason the 4AH batteries don't work well with my 16GA nail gun. The smaller batteries don't bother it as much. It will fire one nail and then stop... Have to pull the battery off then back on again... other wise it's a great backup for older tools that I only have wore out batteries for.