1*Lithium Battery Case Box for Makita BL1890 Power Tool Protection Circuit Board | eBay
Amazon.com: BL1890 Battery case PCB Charge Protection Board housing case for Makita 18V BL1860 9.0Ah 6.0Ah LED Lithium ion Battery Indicator (Box with PCB) : Tools & Home Improvement
BL1890 18V 9.0Ah Replacement Battery Compatible with Makita BL1840 BL1850 BL1860 BL1830 Lithium-Ion Battery Tools with LED Indicator - Walmart.com