3S 12V 18650 Lithium Battery Case, Bracket & BMS Protection Board Kit

Faulty battery packs, dying cordless tools, and expensive manufacturer replacement batteries shouldn't force you to retire your trusty hand drill. Rebuild, upgrade, or build your own custom power source with our 3S 12V 18650 lithium battery case and protection board kit, engineered for optimal cell organization, safe current output, and long-lasting tool performance.

Crafted from high-impact ABS plastic, this complete enclosure kit includes a rugged outer shell, a internal 18650 battery spacer bracket, and a high-performance 3S 12V Lithium-ion Battery Management System (BMS) protection board. The integrated circuit board provides vital multi-layer protection against overcharging, over-discharging, short circuits, and over-current, ensuring your DIY battery pack operates safely under heavy power tool loads. Designed for standard 12V cordless hand drills, screwdrivers, and electric tools, this all-in-one shell and circuit set simplifies battery rebuilding while offering a secure, professional fit.

Key Features

• Complete 3S 12V Assembly Pack: Includes heavy-duty outer case shell, internal cell holder bracket, and 3S 12V BMS protection circuit board.

• Built-In BMS Circuit Protection: Shields against overcharge, over-discharge, short-circuiting, and high-current overload for safe power delivery.

• High-Impact ABS Outer Shell: Flame-retardant, drop-resistant plastic housing protects internal cells from job-site impacts and vibration.

• Precision 18650 Spacer Bracket: Holds cells securely in place, maintaining proper alignment and insulation between battery terminals.

• Standard DC Power Tool Fit: Designed to replace standard 12V cordless drill battery casings across various popular hand tool models.

• Ideal DIY Rebuilding Solution: Perfect for electronics enthusiasts and technicians refurbishing old drill batteries with high-capacity 18650 cells.

Why Choose Our 18650 Battery Case & BMS Set Unlike generic bare cases or unshielded circuit modules, our 3S 12V complete battery enclosure set delivers a custom-fit housing, internal cell alignment brackets, and integrated safety electronics to make battery restoration safe and straightforward.

Perfect For

• Tradespeople, mechanics, and DIYers rebuilding degraded 12V cordless drill battery packs.

• Electronics hobbyists and makers crafting portable 12V DC power banks for custom tools and projects.

• Anyone seeking a cost-effective alternative to buying expensive original manufacturer replacement batteries.

Product Specs

• Quantity: 1 Complete Set (Case Shell, Bracket, & BMS Board)

• Battery Type: 18650 Lithium-ion Cells (Cells Not Included)

• Configuration: 3S (12V Nominal / 12.6V Max DC)

• Material: Flame-Retardant ABS Plastic & PCB Hardware

• Application: Cordless Hand Drills, Screwdrivers, & 12V Power Tools

Restore Your Cordless Power Tools Today Rebuild your 12V battery packs with reliable BMS safety protection. Order your 3S 12V 18650 battery case and circuit kit today!