Amazon.com: Upgraded to 6.0Ah BL1860B Replacement Battery Compatible with Makita 18V Battery Lithium Ion BL1860 BL1850 BL1850B BL1840 BL1840B BL1830 BL1830B BL1815 BL1815B LXT-400(Black) : Tools & Home Improvement
Repairing Makita BL1830 Battery - YouTube
Repairing Makita BL1830 Battery - YouTube
Makita BL1830 18v Battery Repair - YouTube
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
PCB Board for BL1890 BL1830 Lithium Battery Repair Part PCB Circuit Boards Housing Case Kit for Makita 18V 9Ah Batteries - AliExpress