Suitable for Makita 18V BL1830 3.0Ah 5.0Ah Li-Ion battery parts replacement Charging protection circuit board Label paper and LED battery indicator (PCB) - - Amazon.com
Makita 18V Lithium Ion tool battery PCB board for 18V series with plastic box cell holder and nickle strip – LLT POWER ELECTRONIC
Makita – Power Tools Battery Pinouts – Laptop Battery Analyzer and Repair Forum