MT20DL Battery Adapter, Convert for Makita 18V Li-ion Battery to for DeWalt 18V/20V Lithium-Ion Tool Battery Adapter, Use for DeWalt 18V/20V Max Li-ion Cordless Power Tools - - Amazon.com
Makita DCW180Z 18V X2 LXT® Lithium-Ion, 12V/24V DC Auto, and AC Cooler/Warmer, Tool Only - - Amazon.com