Amazon.com: 2 Packs Replace for Makita 18V Battery 6.0Ah, Replacement Makita 18 Volt BL1860B Batteries BL1820B 1830B 1840B 1850B, Compatible with Makita 18v Tools, Fit with Original Makita 18v Battery Charger :
Makita Battery Pack Repair | Hackaday
Waitley 18v 5.0 6.0ah Rechargeable Battery For Makita Power Tools With Led Li-ion Replacement Lxt Bl1860 1850 18 V 9 A 6000mah - Rechargeable Batteries - AliExpress
Makita BL1830 Battery - 18v Li-Ion LXT | Fixings Store
DIY: Repair Makita BL1830 Battery by Making One Good From Two Bad : 8 Steps (with Pictures) - Instructables
Amazon.com: 6.0Ah Replace for Makita 18V Battery BL1860B, Ultra High Capcaity Compatible with Makita 18 Volt Lithium Battery BL1850 BL1850B BL1840 BL1840B BL1830 BL1830B BL1815B with Battery Holder 2 Pack, Black :
How to Adapt Makita Batteries to Other Tools - Powuse