21700 Battery Spacer – 1×2 Radiating Cell Holder

Design professional-grade battery packs with these 1×2 21700 spacers. Their rigid interlocking design keeps cells evenly spaced, promotes heat dissipation, and adds mechanical strength for welding and assembly.

Key Features

• Interlocking structure: build any grid size or pack shape.
• Radiating design: open airflow channels improve cooling.
• Rigid ABS/PC plastic: durable and lightweight.
• Precision fit: holds 21700 cells securely for spot welding.

Specifications

• Cell size: 21700 (Ø21 mm × 70 mm)
• Configuration: 1×2 cell layout
• Material: ABS/PC (black)
• Temperature range: −20 °C – 80 °C typical

Package Includes

• Your selected quantity of 1×2 21700 spacers

Usage

Ideal for DIY e-bike, power tool, solar, and robotics battery packs. For 18650 cells, see our  18650Spacers.

Notes

• Spacers only – batteries, nickel strips, and BMS not included.
• Ensure proper insulation and cell polarity when assembling packs.

Questions about quantities or layout design? Message RenewSpark for help.

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Download “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.