18v Makita Battery Adapter with Low Voltage Shut-Off
Amazon.com: Amityke Battery for Makita 18V Battery 6.0Ah, 4Pack Replacement Batteries Compatible with Makita 18 Volts Battery Fit with Original Makita 18V Battery Chargers : Tools & Home Improvement
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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