DIY: Repair Makita BL1830 Battery by Making One Good From Two Bad : 8 Steps (with Pictures) - Instructables
Makita Battery Pack Repair | Hackaday
DC18RC 18V Battery Super Fast Charger Replace for All Makita 14.4V-18V Lithium Battery BL1415 BL1430 BL1450 BL1440 DC18RD DC18RC DC18RA DC18SF DC18SD 194065-3 194066-1 DA340DRF BDF343 (Not original) - - Amazon.com
Battery Adapter for Makita 14.4V-18V Battery Portable Fast Charging Battery Converter with LED Light and Dual USB Port Compatible with ADP05 BL1815 BL1830 BL1840 BL1850 - Walmart.com
Amazon.com: Powerextra Li-ion Battery Charger for Makita BL1013 BL1014 10.8V-12V Lithium-Ion Batery DC10WA,US Standard Plug : Tools & Home Improvement
Makita BL1815N Lithium-Ion Battery for sale online | eBay