18650 Lithium Battery Pack Case with PCB Protection Board

18650 Lithium Battery Pack Case with PCB Protection Circuit Board

Build or upgrade your own battery pack with this large-capacity 18650 Lithium Battery Pack Case. Designed for DIY electrical enthusiasts, this robust enclosure supports 21V, 25V, and 42V lithium battery configurations and comes complete with a built-in Protection Circuit PCB Board to help safeguard your cells during use. Whether you're assembling a power tool battery, e-bike pack, or custom energy storage project, this case provides a solid, organized foundation for your build.

Made in Mainland China.

Key Features

• Multi-Voltage Compatible: Supports 21V, 25V, and 42V lithium battery configurations for versatile DIY applications
• Built-In PCB Protection Board: Integrated protection circuit helps prevent overcharge, over-discharge, and short circuits
• Large Capacity Design: Spacious interior accommodates multiple 18650 cells for extended power storage
• Durable Construction: Made from a combination of plastic and metal for a sturdy, long-lasting build
• Compact & Practical Size: Measures 14.8 × 7.3 × 11 cm (5.83 × 2.87 × 4.33 in) — easy to integrate into your project
• Clean Black Finish: Sleek, no-fuss black color that suits most DIY builds

Specifications

Perfect For

• DIY electric bike (e-bike) battery packs
• Power tool battery rebuilds
• Custom portable energy storage projects
• Hobbyist electronics and maker builds

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Note: Photos may not reflect exact size — please refer to the dimensions listed above. Slight color variations may occur due to monitor settings. Minor measurement differences of 1–2 cm may exist due to manual measuring.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What battery cells are compatible with this 18650 lithium battery pack case?

A: This battery pack case is specifically designed for standard 18650 lithium-ion cells. It supports configurations for 21V, 25V, and 42V battery packs, making it suitable for a wide range of DIY electrical projects including e-bikes, power tools, and custom energy storage builds.

Q: Does the case come with the 18650 battery cells included?

A: No, the package includes 1 × battery pack case with PCB protection circuit board only — 18650 battery cells are NOT included and must be purchased separately. This is a housing and protection board solution for your own DIY battery assembly.

Q: What does the built-in PCB protection board do?

A: The integrated Protection Circuit PCB Board is designed to help safeguard your 18650 lithium cells by monitoring and managing overcharge, over-discharge, and short-circuit conditions during operation, contributing to a safer and more reliable DIY battery pack build.

Q: What are the dimensions of this battery pack case?

A: The case measures 14.8 × 7.3 × 11 cm (approximately 5.83 × 2.87 × 4.33 inches). Please note that slight variations of 1–2 cm may occur due to manual measurement.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.