100-Piece 18650 / 21700 Li-Ion Battery Barley Paper Insulation Gaskets

Exposed positive terminals, accidental short circuits, and dangerous thermal risks shouldn't compromise your custom battery pack builds or repair projects. Protect your lithium-ion cells, ensure terminal safety, and extend the lifespan of your power packs with our 100-piece barley paper battery insulation gaskets, engineered to provide high-grade electrical isolation for 18650 and 21700 cells.

Crafted from premium, heavy-duty barley paper (fish paper), these precision ring gaskets feature exceptional dielectric strength, heat resistance, and mechanical toughness. Designed with a hollow center ring, each gasket fits flush over the raised positive electrode button without obstructing spot-welding nickel strips. They create a reliable protective barrier between the battery casing's negative shoulder and the positive terminal, preventing short circuits caused by vibration, heat shrink degradation, or accidental contact during nickel spot welding. Essential for DIY power wall builders, e-bike battery builders, and electronics repair technicians.

Key Features

• 100-Piece High-Volume Value Pack: Includes 100 precision die-cut insulation rings, giving you ample supply for full-scale battery pack builds and routine shop maintenance.

• Superior Electrical Isolation: Made from high-density barley paper with high dielectric properties to prevent dangerous terminal-to-case short circuits.

• Heat & Wear Resistant: Formulated to withstand elevated operating temperatures, electrical arcing, and mechanical friction without degrading or melting.

• Hollow Center Design: Allows clear access to the center electrode for clean spot welding or soldering of nickel strips without compromising perimeter isolation.

• Self-Adhesive Backing: Features a strong, pre-applied sticky backing for quick, accurate, and permanent alignment on individual cell terminals.

• Universal Cell Standard Fit: Precisely sized for standard 18650 or 21700 lithium-ion cylindrical cells used in power tools, solar banks, and electric mobility devices.

Why Choose Our Barley Paper Terminal Isolators Unlike cheap plastic washers that warp under heat or thin paper stickers that tear during nickel strip welding, our barley paper insulation pads deliver heavy-duty thermal and electrical protection. Their self-adhesive backing ensures fast, bubble-free application that stays locked in place through intense pack assembly and long-term use.

Perfect For

• DIY battery pack builders constructing custom e-bike power packs, solar energy storage, power tool batteries, and power walls.

• Electronics repair technicians, RC hobbyists, and spot-welding enthusiasts servicing lithium-ion arrays.

• Anyone building or re-wrapping 18650 and 21700 cells who needs reliable, professional terminal safety.

Product Specs

• Quantity: 100 Pieces

• Cell Compatibility: Standard 18650 / 21700 Cylindrical Lithium-Ion Cells

• Application: Positive Electrode Ring Insulation & Short-Circuit Prevention

• Material: Heavy-Duty Barley Paper (Fish Paper) with Self-Adhesive Backing

• Type: Hollow Ring Gasket

Ensure Maximum Battery Pack Safety Today Protect your custom lithium-ion builds from short circuits and thermal hazards with professional terminal insulation. Order your 100-piece barley paper battery insulation gasket set today and build your power packs with complete confidence!