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 :
1421 Makita® 14.4V Battery Rebuild Service – MTO Battery
Makita BL1830 18v Battery Repair - YouTube
Amazon.com: 2-Pack 6000mAh Replacement for Makita 18V Batteries with 18V DC to 110V AC 300W Power Inverter, Built-in Work Light, USB Type-C, Dual USB Ports Compatible with Makita Battery - Portable Power
How to repair makita battery for $12 [easy fix with using repair kit -new pcb and housing] - YouTube
Makita 18V LXT Lithium-Ion Battery and Rapid Optimum Charger Starter Pack (5.0Ah) BL1850BDC2 - The Home Depot
How to disassemble recent Makita battery packs to salvage cells - YouTube
Makita Battery 12 volt Model PA12 For Parts Or Repair | eBay