21700 Battery Spacers

21700 battery spacers are holders that keep cells aligned and evenly spaced when you build a pack.

Cell layout matters in a multi-cell build, and spacers are what lock it in. They align cells for clean welds, hold even gaps between them so air can move and heat can escape, and give the pack mechanical structure that stands up to handling and vibration. That recommended gap between cells isn't arbitrary — spacers make it consistent every time.

Made for 21700 cells, they're a go-to supply for building organized, stable packs in series and parallel.

Key features

• Keeps 21700 cells aligned
• Holds even spacing for airflow and cooling
• Adds structure and stability to the pack
• Makes layout clean and repeatable

Built for

• Aligning cells during assembly
• Spacing cells for heat dissipation
• Structuring series and parallel packs
• Custom and DIY 21700 builds