5-Cell 21700 Li-ion Battery Case & BMS Protection Board Set for Makita 18V Compatible Tools

Rebuild and optimize your power tool battery packs with high-output 21700 cells using this 5-Cell 21700 Li-ion Battery Case & BMS Protection Board Set. Engineered for custom battery assembly and housing replacement, this compact enclosure holds five high-capacity 21700 lithium-ion cells, delivering higher energy density and superior power discharge compared to standard 18650 packs. Designed for seamless compatibility with Makita 18V LXT interface tools as well as Lomvum, Zhipu, Hongsong, and Jingmi platforms, it includes a precision-engineered PCBA Battery Management System (BMS) board. The integrated circuit safeguards against overcharging, deep discharge, short-circuiting, and thermal overload. Forged from high-impact, flame-retardant ABS polymer, it comes complete with terminal contacts, internal cell holders, and power indicator windows for easy DIY assembly.

Key Features

• 5-Cell 21700 Compact High-Power Form: Accommodates five 21700 lithium cells for maximum current output in a lightweight, ergonomic footprint.

• Integrated PCBA BMS Protection: Intelligent circuit board actively guards against overcharging, over-discharging, short circuits, and overheating.

• Wide Tool Platform Fitment: Precision molded to dock onto Makita 18V LXT interface tools and compatible Lomvum, Zhipu, Hongsong, and Jingmi equipment.

• Flame-Retardant ABS Impact Shell: High-tensile, heat-resistant outer casing shields internal battery cells from drops, vibration, and job site wear.

• LED Battery Level Indicator Support: Designed with viewing windows and mounting space for visual power level indicator lights.

• Complete DIY Assembly Hardware: Includes outer plastic housing, cell holding brackets, nickel connector strips, assembly screws, and BMS board.

Why Choose Our 5-Cell 21700 Battery Case Kit

Damaged battery casings or failing circuit boards render valuable lithium cells useless, while buying replacement OEM packs is expensive. This 5-cell 21700 DIY battery case kit combines high-drain cell housing capability, smart BMS electronic protection, high-impact ABS drop resistance, and broad Makita-style interface compatibility—giving your cordless power tools, DIY battery rebuilds, and workshop equipment an instant commercial-grade upgrade.

Perfect For

• Rebuilding broken or worn-out 18V power tool batteries using high-capacity 21700 lithium cells

• Assembling lightweight, high-power battery packs for cordless drills, impact drivers, and compact saws

• Replacing cracked, melted, or scratched outer battery shells on Makita-interface tools

• DIY electronics enthusiasts, technicians, and woodworkers building custom power supplies

Specifications

• Type: 5-Cell 21700 Li-ion Battery Case & PCBA BMS Circuit Board Kit

• Cell Compatibility: 5x 21700 Lithium-Ion Battery Cells

• Protection Features: Overcharge, Over-Discharge, Over-Current, Short Circuit, Thermal Safeguards

• Materials: Fire-Retardant ABS Polymer & High-Conductivity Copper PCB

• Tool Compatibility: Makita 18V LXT Interface, Lomvum, Zhipu, Hongsong, Jingmi

• Ideal Uses: Power Tool Battery Repair, Custom 21700 Pack Assembly, Housing Replacement