Makita 18V LXT 12Ah Battery Rebuild Kit – 15-Cell 21700 BMS, Shell & Hardware – No Cells

Makita 18V LXT 12Ah Battery Rebuild Kit – 15-Cell 21700

Rebuild or assemble a Makita 18V LXT compatible high-capacity battery pack using fifteen 21700 lithium-ion cells.

This complete DIY battery rebuild kit includes the battery housing, circuit board, cell holders, conductive plates, battery-level indicator, hardware, and internal components shown in the product photos.

Battery cells are not included. This kit is intended for experienced battery builders who will supply, test, match, install, and spot-weld their own 21700 lithium-ion cells.

Product Features

• Compatible with Makita 18V LXT tools and compatible chargers
• Designed for fifteen 21700 lithium-ion cells
• 15-cell, 5S3P battery configuration
• 12Ah-style high-capacity battery housing
• Includes battery management circuit board
• Includes upper and lower battery housing
• Includes molded 21700 cell holders
• Includes conductive metal plates and contacts
• Includes battery-level indicator components
• Includes screws and assembly hardware
• Battery cells are not included
• Assembly service is not included

Battery Capacity

The finished capacity depends on the specifications of the 21700 cells selected by the builder. A 5S3P configuration using 4,000mAh cells can produce a nominal capacity of approximately 12Ah.

Actual capacity, output current, runtime, and performance depend on the cells used, the quality of the assembly, and the operating conditions.

What Is Included

The kit includes the battery housing, BMS circuit board, 21700 cell holders, conductive metal plates, electrical contacts, battery-level indicator components, springs, screws, labels, and other parts shown in the product photos.

Please review all product photos carefully for the exact components included with this kit.

What Is Not Included

• 21700 lithium-ion cells
• Spot welder
• Battery charger
• Power tool
• Battery assembly service

Assembly Requirements

This product is intended for experienced users familiar with lithium-ion battery construction, cell testing, cell matching, insulation, polarity, series and parallel connections, BMS wiring, and spot welding.

The buyer is responsible for selecting suitable high-drain 21700 cells with the correct voltage, capacity, discharge rating, chemistry, and specifications for the intended application.

Use only properly tested and closely matched cells. Do not mix cells of different brands, models, capacities, ages, voltage levels, chemistry, or condition.

Important Safety Information

Improper lithium-ion battery assembly can cause fire, personal injury, equipment damage, or property damage. Proper tools, insulation, testing equipment, safety procedures, and battery-building experience are required.

Always verify cell orientation, polarity, wiring, insulation, pack voltage, and output voltage before connecting the completed battery pack to a tool or charger.

Additional Parts and Resources

For additional battery-building parts, 21700 cells, conductive materials, connectors, cell holders, and BMS boards, visit RenewSpark.

For helpful battery tools, calculators, technical information, and additional resources, download the RenewSpark Tools app.

Makita and LXT are trademarks of their respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Makita.