18650 21700 32650 Li-ion Battery Insulation Gasket | Barley Paper Cell Hollow Insulating Pads

Keep your battery packs safe and organized with these precision-cut insulation gaskets. Designed for 18650, 21700, and 32650 lithium-ion cells, these barley paper pads create a reliable barrier between the positive and negative terminals. They help prevent short circuits, reduce vibration, and improve the overall durability of your battery assembly.

Each gasket is made from durable barley paper with a self-adhesive backing for quick and secure placement. The hollow ring design fits snugly over the battery terminal, providing consistent insulation without adding bulk. Whether you are building a custom power bank, an electric bike battery, or a solar storage pack, these pads offer a simple way to improve safety and performance.

The material provides good heat resistance and electrical insulation, making it suitable for high-drain applications. The adhesive layer holds firmly during assembly and remains stable under normal operating conditions. These pads are a practical choice for hobbyists, repair technicians, and anyone working on DIY battery projects.

With multiple size options in one pack, you can work on different battery types without needing separate orders. The lightweight design keeps your battery pack compact while adding an essential layer of protection.

Key Features and Benefits

- Hollow ring shape that fits over the battery terminal to create a clean insulation barrier between cells

• Self-adhesive backing that makes installation fast and secure without extra glue

• Barley paper material that provides good heat resistance and electrical insulation for safer battery packs

• Compatible with 18650, 21700, and 32650 lithium-ion cells for flexible use across different projects

• Thin and lightweight design that does not add extra bulk to your battery assembly

Who Is This For

- DIY electronics enthusiasts building custom battery packs for power tools, flashlights, or portable devices

• Repair technicians replacing damaged insulation in laptops, e-bikes, or battery banks

• Hobbyists working on solar energy storage or electric vehicle battery modules

• Workshops and makerspaces that need reliable insulating components for prototyping

Usage Scenario

Mark was assembling a 12V battery pack for his portable camping power station. He had 12 cells to connect in series and needed to make sure no short circuits would occur between the positive and negative terminals. He peeled off the backing from each barley paper gasket, placed it over the top of each cell, and pressed down firmly. The adhesive held the pad in place while he spot-welded the nickel strips. The build was clean, safe, and ready for testing in under 20 minutes.

Micro Comparison

Compared to plastic or rubber insulators, barley paper gaskets offer a thinner profile and better heat resistance, which is important in high-drain battery packs. They are also easier to apply because of the pre-applied adhesive, unlike loose cardboard rings that can shift during assembly. For most DIY and repair projects, these pads provide a good balance of insulation, ease of use, and cost.

Specifications

Material: Barley Paper

Shape: Ring Gasket

Compatible Battery Sizes: 18650, 21700, 32650

Adhesive: Yes (self-adhesive backing)

Color: Green

Package Includes

- 100 x Insulation Gasket Pads (assorted sizes for 18650, 21700, and 32650 batteries)

Why You Will Love It

These gaskets give you peace of mind when building or repairing battery packs. The adhesive backing saves time, and the barley paper material handles heat well. With 100 pieces in the pack, you will have plenty on hand for multiple projects.

Questions and Answers

Question: Are these pads reusable after removal?

Answer: No, the adhesive backing is designed for one-time use. Once removed, the pad may lose its stickiness and should be replaced with a new one.

Question: Will these fit flat-top 18650 batteries?

Answer: Yes, the hollow ring design works with both flat-top and button-top 18650 batteries.

Question: Can I use these for 26650 batteries?

Answer: These pads are specifically cut for 18650, 21700, and 32650 sizes. They may not fit 26650 cells properly.

Question: Do I need to apply extra glue?

Answer: No, the pads come with a self-adhesive backing. Just peel and stick.

Question: Are these pads safe for high-discharge batteries?

Answer: Yes, the barley paper material offers good heat resistance and electrical insulation, making it suitable for high-drain applications.