Amazon.com: AuthFrank Battery Adapter converts for Bosch 18V Lithium Battery to for Makita 18V Lithium Battery BL1840 BL1850 BL1830 BL1860B LXT 400 etc. : Tools & Home Improvement
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