18650 Battery Insulation Paper Hollow Pack 4S Hole (1 pc)
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Prices updated: 13 Oct 2026
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About this product
Dark green hollow insulation paper rings for 18650 and 18500 lithium cells, sized for a 4S cell arrangement. They are placed between cells to keep the metal surfaces apart, which helps prevent short circuits inside the battery pack. Supplied as one 0.25 mm thick piece.
Specifications
- Compatibility
- 18650 / 18500 lithium cells
- Cell configuration
- 4S
- Outer ring diameter
- 17 mm
- Inner ring diameter
- 10 mm
- Thickness
- 0.25 mm
- Pieces per pack
- 1
- Color
- Dark Green
Frequently asked questions
What is this insulation paper used for?
It separates lithium cells in a battery pack so their metal surfaces do not touch, which reduces the risk of short circuits.
Does it fit cells other than 18650?
It is listed for 18650 and 18500 cells. Check that the ring dimensions match your cell and holder before use.
