21700 Battery Holder Box Set – 1/2/3/4 Slot ABS Plastic Case

$29.22 $34.57

21700 Battery Holder Box Set – 1, 2, 3 & 4 Slot Configurations

This versatile 4-piece set of 21700 battery holder boxes gives you everything you need to power your electronics projects with confidence. Each holder features a rugged ABS plastic housing combined with copper contact points and spring-loaded metal pins for reliable, low-resistance connections every time.

Whether you're building PCB assemblies, robotics prototypes, LED setups, or portable power packs, this set has you covered with four different slot configurations in one convenient package.

Key Features

Sturdy ABS + Copper Construction: Flame-resistant and heat-resistant ABS plastic housing paired with brass rivet copper connectors ensures optimal conductivity and long-lasting durability across electronics projects.
Spring-Loaded Metal Pins: Secure battery contact with spring-loaded pins and base screw holes for easy, tool-minimal installation into your project enclosure or PCB layout.
Flexible Wiring Options: Supports both parallel and series configurations (1, 2, 3, or 4 slots) to deliver varying power outputs — 3.7V per cell — ideal for a wide range of voltage requirements.
Wide 21700 Compatibility: Designed specifically for 21700 lithium cells, compatible with digital displays, portable gadgets, robotics, and other low-power electronics that need consistent energy delivery.
Compact & Portable: Space-saving black plastic casing keeps batteries secure while maintaining a lightweight profile — perfect for prototyping, lab work, or field electronics maintenance.

Specifications

Material: ABS Plastic + Copper
Length: Approx. 83mm / 3.26 inches
Voltage: 3.7V per cell (series/parallel configurable)
Compatible Battery: 21700 cells
Slots Available: 1-slot, 2-slot, 3-slot, 4-slot (one of each included)
Color: Black

Package Includes

4 × 21700 Battery Holder Boxes (1-slot, 2-slot, 3-slot, and 4-slot — one each)

Note: Please allow ±1–2cm tolerance due to manual measurement. Slight color variations may occur due to different display settings.

Made in Mainland China.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What battery size is compatible with these 21700 battery holder boxes?

A: These battery holder boxes are designed exclusively for 21700 lithium cells. Each slot accommodates a standard 21700 battery (approximately 21mm diameter × 70mm length), making them ideal for electronics prototyping, DIY builds, and portable power applications using this popular cell size.

Q: Can I wire the battery slots in series or parallel configuration?

A: Yes! The holders support both series and parallel wiring configurations. When wired in series, each 3.7V cell adds to the total voltage output; when wired in parallel, cells share the load for greater capacity. This flexibility makes the set suitable for a wide range of project voltage and current requirements.

Q: How many battery boxes are included in the package?

A: The package includes 4 battery holder boxes in total — one 1-slot, one 2-slot, one 3-slot, and one 4-slot holder. This gives you a complete set of configurations to suit various electronics projects without purchasing them separately.

Q: Are the battery holders easy to mount or install?

A: Absolutely. Each holder features base screw holes for secure mounting and spring-loaded metal pins for effortless battery insertion and removal. Minimal tools are needed for installation, making them beginner-friendly for hobbyists and experienced makers alike.

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.