FirstPower Battery Adapter for Makita 18V Lithium-ion Power Tools,Convert Milwaukee 18V or Dewalt 20V Lithium-ion Battery to Makita 18V Lithium-ion Battery - - Amazon.com
Bulk, 18V - - Amazon.com
Amazon.com: Battery Adapter for Bosch 18V Battery USB Charger & 12v DC Port & LED Work Light - Power Source Supply for Bosch Lithium-ion Battery ( Battery Not Included) : Tools & Home