Amazon.com: 【18 Volt 6.0Ah BL1860B】 2Packs Replacement Battery and Charger for Makita 18V Battery Lithium BL1860 BL1850 BL1845 BL1840 BL1830 BL1820 BL1815 BL1860B Battery + 1 Charger for Makita 14.4v-18V Battery :
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
Amazon.com: 4 Pack BL1860B 18 Volt 6.0Ah Replacement Battery Compatible with Makita 18V Lithium ion Battery 1860 BL1850 BL1840 BL1830 BL1820 BL1815B LXT400 194204-1 with LED Indicator Cordless Power Tools(Black) : Tools
Repairing Makita BL1830 Battery - YouTube
18V Battery Protection Board Battery Chip PCB Board Charging Protection For Makita BL1830 BL1840 BL1850 LXT400 Repair parts
Case PCB Circuit Board Kits For MAKITA 18V BL1830 BL1840 BL1850 Li-ion Battery | eBay
DIY: Repair Makita BL1830 Battery by Making One Good From Two Bad : 8 Steps (with Pictures) - Instructables