Amazon.com: Power Wheel Adapter for Makita 18V Battery with Fuse & Switch & Wire terminals,Power Connector for Rc Car, Robotics, Rc Truck,DIY use, Work with for Makita BL1860 BL1850 BL1840 BL1830 Li-ion
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
DM18M Adapter converts for Dewalt 20V Lithium Battery and for Milwaukee 18V M18 Lithium Battery to for Makita 18V Lithium Battery BL1830 BL1840 BL1850 - - Amazon.com
waitley 18V 9.0Ah Replacement Battery Compatible with Makita BL1830 BL1840 BL1850 BL1860 BL1890 Lithium-Ion Battery Tools with LED Indicator - - Amazon .com