18650 Battery Spacer – 1×1 Interlocking Cell Holder

Build cleaner, safer packs with these snap-together 18650 spacers. The honeycomb design keeps cells uniformly spaced for better airflow, rigidity, and shock isolation—ideal for DIY power-tool, e-bike, scooter, and robotics packs.

Why builders like these

• Interlocking grid: snaps together in any layout (series/parallel).
• Thermal spacing: promotes heat dissipation between cells.
• Rigid & light: molded ABS/PC; resists vibration and compression.
• Clean welding: keeps cells aligned for consistent nickel strip welds.

Specs

• Cell size: 18650 (Ø18 mm × 65 mm)
• Form factor: 1×1 single-cell spacer (interlocks to form larger arrays)
• Material: ABS/PC (black); working temp: −20 °C to 80 °C (typ.)
• Mounting: press-fit around cells; add adhesive/straps as desired

What’s included

• Your chosen pack size of 1×1 18650 spacers (no cells or nickel included).

Compatibility

Fits standard 18650 cylindrical cells. For 21700 cells, use our 21700 series spacers.

Notes

• These are spacers/holders only—no batteries, nickel, or BMS.
• Always follow proper battery safety and insulation practices.

Questions about pack layouts or quantities? Message RenewSpark and we’ll help you choose.

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