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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
Amazon.com: 2 Pack 18V 5000mAh Lithium-ion Replacement Battery for Makita and 14.4V-18V Replacement Charger for Makita BL1830 BL1850 BL1840 : Tools & Home Improvement
Amazon.com: QINIZX Battery Adapter for Makita 18 Volt NiCad & NiMh Cordless Power Tools, Convert Makita BL1830B BL1850 BL1860 BL1840B 18V Lithium-Ion Battery to Makita 18V Ni-Cd/Ni-Mh Battery Converter : Tools &