Milwaukee M18 12.0Ah Case + BMS | 15×21700 Battery Rebuild Kit

Milwaukee M18 12.0Ah Battery Case & BMS Rebuild Kit

This DIY rebuild kit is designed for rebuilding or repairing Milwaukee M18 12.0Ah lithium-ion power tool batteries. It includes a complete replacement housing, internal metal contacts, hardware, and a compatible BMS board. Perfect for experienced battery builders looking to restore performance using 15×21700 lithium-ion cells.

Kit Includes:

• Milwaukee M18 12.0Ah compatible battery case (top & bottom shell)
• BMS / protection board
• Nickel-plated internal contact plates
• Spring contacts
• Thermal pad and insulation pieces
• Screws and assembly hardware

Cell Configuration:

• Designed for 15 × 21700 lithium-ion cells
• Cells are NOT included

Important Information:

• This is a DIY battery rebuild kit
• Battery assembly experience is required
• Spot welding is strongly recommended
• Cells, charger, and tools are not included
• For rebuild and repair use only

If you need anything for rebuilding batteries — such as cells, nickel strips, insulation rings, BMS boards, or other DIY battery supplies — visit RenewSpark.

For calculators, rebuild planning tools, and battery design utilities, check out the RenewSpark Tools mobile app.