Amazon.com: Ahomtikk 2Pack 6.5Ah BL1860B Battery with DC18RD Dual Port Charger Replacement for Makita 18V Battery with LED Display and Battery Charger Combo for Makita 18V LXT-400 BL1830 BL1850 BL1840 : Tools
Lithium Ion Battery Circuit Board for Makita BL1830(18V 1.5Ah/3.0Ah/6Ah) : Electronics - Amazon.com
Repairing Makita BL1830 Battery - YouTube
Suitable for Makita 18V BL1830 3.0Ah 5.0Ah Li-Ion battery parts replacement Charging protection circuit board Label paper and LED battery indicator (PCB) - Amazon.com
Amazon.com: waitley 2Pack 18V 6.0Ah Replacement Battery Compatible with Makita BL1830 BL1840 BL1850 BL1860 BL1860B-2 BL1890 Lithium-Ion Battery Cordless Power Tools with LED Indicator : Tools & Home Improvement