Amazon.com: Adapter Converter for Makita 18V BL1860 BL1850 BL1840 Li-ion Battery to Ridgid AEG 18V Hyper li-ion Power Tool Battery : Tools & Home Improvement
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New For Makita 18V 6.0Ah Li-Ion Battery BL1860 3.0Ah/8Ah/9Ah Or Charger BTL063Z | eBay
18V BL1850B For Makita 5.0Ah Lithium-ion Battery or Charger LXT BL1830 BL1850 US | eBay
Repacking Makita 18v Lithium battery with New Cells (Save $$$'s) - YouTube