Makita BL1840 Lithium Battery, 18 V, 4 Ah, 120 V 26 min Charge
Makita vs. Hitachi - Midrange Combo Kits with High Expectations
Amazon.com: for Makita 18V Battery Adapter Convert to for Hitachi 18V Lithium Cordless Tool and for Metabo18V (Not 36V) Slide Style Tools : Tools & Home Improvement