SOUL POWER Launches Flame-Retardant Soft Pouch as Lithium-ion Battery Fires Surge

Background
Development Background
Product Overview
Key Features
Target Products
Sales Information

Background

According to data from the Tokyo Fire Department, fires caused by lithium-ion batteries are not only prevalent in warmer summer months but also frequently occur from autumn to winter. October, in particular, records a high number of fires second only to summer, with November and December also showing elevated figures. As of May 2026, the incidence of these fires had already increased by 1.5 times compared to the same period in the previous year, highlighting the urgent need for preventative measures ahead of the upcoming autumn and winter seasons. When a lithium-ion battery ignites, its surface temperature can reach 700-800°C, a heat level that typical storage bags cannot contain or prevent from spreading.

Development Background

As a company that plans and sells rechargeable airbrushes and other lithium-ion battery-equipped products under its SOUL POWER brand, SUPERPETER Technology Co., LTD. has been deeply concerned by the recent surge in battery-related accidents. This concern motivated the company to develop and release this flame-retardant soft pouch, ensuring customers can use their products safely.

Product Overview

The SOUL POWER Flame-Retardant Soft Pouch is constructed with a five-layer structure of silicone-coated glass fiber material. It has successfully passed the glow-wire flammability test (IEC 60695-2-11: 2021) conducted by SGS, an international third-party testing organization, achieving a pass at the highest testable temperature of 960°C.

Key Features

Superior Flame and Heat Resistance

In addition to passing the SGS glow-wire flammability test at 960°C without ignition, the pouch utilizes a highly heat-resistant material that has withstood a one-hour heat treatment in a 1000°C muffle furnace in independent performance tests conducted by the manufacturer.

Impact Destruction (Thermal Runaway) Test with Large Capacity Mobile Battery

The company conducted an internal demonstration test where a 20,000mAh mobile battery was stored inside the pouch and intentionally destroyed by impact, inducing thermal runaway. The test confirmed that even during severe thermal runaway, the pouch effectively suppressed the ejection of flames and rapid spread of fire to the outside.

Five-Layer Structure

The pouch features a robust five-layer construction: outer fabric (silicone layer + glass fiber) and inner fabric (silicone layer + glass fiber + silicone layer).

High-Strength Wire Stitching

By using wire for the sewing thread, the strength is significantly enhanced. This robust design ensures that even if a battery expands inside, the pouch is resistant to tearing or bursting at the seams.

Optimized Size and Safety Specifications

Through research into existing products, the pouch has been designed to accommodate larger mobile batteries with ample space. It also features a lockable zipper to prevent accidental opening during transport and to secure charging cables. This design prioritizes both detailed safety and ease of use.

Target Products

The SOUL POWER Flame-Retardant Soft Pouch is suitable for a wide range of lithium-ion battery-equipped products, including mobile batteries, smartphones, RC batteries, and power tool batteries.