The 21700 Lithium Battery 4-Cell Hollow Fish Paper Insulation Gasket is specially designed for lithium-ion battery pack assembly, providing reliable electrical insulation and protection between battery cells and metal components. Made from high-quality electrical insulating fish paper (barley paper), it features excellent heat resistance, flame retardancy, and mechanical strength.
This die-cut insulation spacer is suitable for 21700 cylindrical battery modules, energy storage battery packs, EV battery systems, power tools, and customized battery assemblies. The hollow 4-cell design helps improve assembly efficiency while reducing the risk of short circuits caused by contact between conductive parts.