30-Cell 18650 Battery Case + PCB for Makita-Compatible DIY Packs

Aftermarket battery enclosure and PCB for a DIY power-tool battery build using up to 30 cylindrical 18650 cells. Case and PCB only. Battery cells, charger, tools, and welding materials are not included. Supplier identification Selected order option: 30X18650BOXPCB Supplier-listed platform: Makita-compatible 18V-class / 21V-max tools Aftermarket component; not manufactured, sponsored, or endorsed by Makita Compatibility notice: Exact cell layout, PCB revision, protection limits, charger interface, fastener set, and tool compatibility vary by build and must be verified by the builder before assembly or use. Do not assume compatibility from appearance alone. Builder requirements and safety For experienced pack builders with suitable cells, insulation, cell-level fusing where appropriate, a capable spot welder, and a validated assembly process. Match cells for voltage and condition before assembly. Confirm PCB protection behavior, conductor sizing, current sharing, thermal management, enclosure clearance, and charger compatibility before use. Never solder directly to cell terminals. Do not mix new and used cells or cells of different models or states of charge. Ships from DIY500AMP.COM in Florida when in stock.