A "Shelter" for Mobile Batteries in Case of Emergencies! Announcing the MaGdget Fireproof Bag, an Internationally Certified Fire Containment Bag
Sincere Co., Ltd. has launched the 'Fireproof Bag' under its gadget brand 'MaGdget,' designed to prevent the spread of fire from mobile battery accidents. The product has passed type testing by the international accreditation body ilac-MRA, achieving high safety with a 3-layer structure capable of withstanding instantaneous temperatures of 1000°C. It protects users from potential accidents during air travel or while charging overnight. A 4-layer, magnet-closure version is also available exclusively online.
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- 📰 Published: May 19, 2026 at 19:23
- 🔍 Collected: May 19, 2026 at 11:01
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Sincere Co., Ltd. (Headquarters: Naniwa-ku, Osaka; Representative Director: Jun Nishimori) has launched the "Fireproof Bag" from its brand "MaGdget," which offers products combining magnets and gadgets.
In recent years, with the proliferation of smartphones and laptops, carrying mobile batteries has become a daily routine. However, thermal runaway and sudden ignition accidents due to impact or degradation of lithium-ion batteries continue to be a social issue both in Japan and abroad. Against this backdrop, we developed this product as a "shelter for mobile batteries" to minimize the spread of fire to belongings in a bag or surrounding furniture in the event of an abnormal ignition.
■ World-Class Safety Recognized by International Accreditation Body ilac-MRA
This product has passed rigorous type testing conducted by a third-party inspection body accredited by ilac-MRA, an international accreditation organization whose test results are mutually recognized worldwide. In scenarios involving the most dangerous battery short-circuits and overcharging, its high containment performance has been officially certified to prevent flames or liquid leakage from escaping, even if a severe fire or smoke occurs inside the bag.
■ Instantaneous Fire Resistance up to 1000°C, Amazing 3-Layer Structure Technology
In safety tests, the bag showed no penetration or combustion after being exposed to an 800°C flame for 30 seconds. With an instantaneous fire resistance temperature of up to 1000°C and a long-term heat resistance of 550°C, it is equipped to handle ignition accidents. The uniquely designed tough 3-layer fabric completely blocks heat, thoroughly eliminating the risk of fire spreading to the surroundings.
■ Peace of Mind When Flying. A New Habit for In-Flight Emergencies
In recent years, regulations for carrying mobile batteries on aircraft have become stricter, and an in-flight fire incident can lead to a major accident. This product safely protects batteries up to the 20,000mAh class, which meets in-flight carry-on standards. It prepares for the risk of thermal runaway due to pressure changes or impacts at high altitudes, providing a journey of reassurance without inconveniencing others in the confined cabin space. It is a reliable partner for business trips and overseas travel, becoming a new standard safety item in your cabin bag.
■ Preparing for "Unnoticeable Ignition" During Sleep. A Safe Place to Protect Vulnerable Nighttime Hours
Troubles with lithium-ion batteries can occur without warning, even while we are in a deep sleep. During sleep, it is most difficult to notice abnormalities such as smoke or strange odors, making response times slower and leaving us very vulnerable. By storing your mobile battery in this product as its "nighttime spot" after a day's use, you can completely contain any potential incidents inside the bag while you sleep, quietly protecting your beloved family and home until morning.
■ EC-Exclusive 4-Layer Structure and Smart Magnetic Closure
While the standard version has a 3-layer structure, the e-commerce exclusive model has been upgraded to an extra-thick "4-layer structure" with an added silicone sheet. Furthermore, the closure has been changed from the standard Velcro version to a smart magnetic closure.
Although the standard 3-layer Velcro version is the one that has cleared the strict tests of international organizations, the magnetic version further improves sealing power and heat-shielding performance. It achieves both intuitive ease of use and high safety for securely containing flames.
■ Color Variations
We offer two stylish colors that blend into any daily scene. A chic black that pairs well with business bags and gadget pouches, and a sophisticated gray that looks beautiful with casual attire and brightly toned belongings.
■ SPEC
Selling Price (excl. tax) ¥2,000 [Magnet Ver. EC Exclusive] ¥1,800 [Velcro Ver.]
Body Size: Approx. 132×180×10mm
Weight: Approx. 105g [Magnet Ver. EC Exclusive] Approx. 55g [Velcro Ver.]
Material: Liquid silicone, fiberglass cloth, fireproof steel wire thread, No. 5 nylon resin zipper, magnet
Max Storage Size: Approx. 100 × 70 × 35 mm
Instantaneous Fire Resistance Temp: 1000°C
Long-term Heat Resistance Temp: 550°C
Purchase Sites
Official Site: https://magdget.com/products/esp02300
Amazon: https://www.amazon.co.jp/dp/B0GVSKV7TL
Rakuten: https://item.rakuten.co.jp/sincere-watch/esp02300/?l-id=shoptop_widget_filtered_item_list
ZOZOTOWN: https://zozo.jp/shop/sincere/goods/106233952/?did=170151746
■ Disclaimer
・This product does not prevent battery accidents from occurring.
・Safety is not guaranteed for all batteries.
・Test results are based on evaluations under specific conditions, and results may vary depending on usage conditions and battery state.
・As this product is not completely sealed, smoke or fire may leak from the zipper or fabric gaps in the event of an ignition. Do not place flammable items nearby.
・If a battery is stored in this product, avoid leaving it in high-temperature, high-humidity environments such as inside a car or in direct sunlight, and refrain from charging the battery while it is stored.
・Depending on the combination of length, width, and thickness, some devices may not fit. Please check the size of your device beforehand.
・While this product is designed to suppress external fire spread, the case itself may become hot due to the heat from an internal ignition. If an internal fire is suspected, do not touch the case directly until it has cooled sufficiently, and handle it with caution after ensuring the safety of the surroundings.
・The various safety performance and certification tests for this product were conducted and obtained with a similar model featuring a Velcro closure.
■About MaGdget
"MaGdget" is a portmanteau of Magnet and Gadget, a brand launched from Japan to the world. With Apple's MagSafe charging gaining attention, the demand for magnet-based gadgets is increasing. We believe that by skillfully combining magnets and gadgets, new possibilities can be born, reducing stress and effort. While equipped with unprecedented functions, their use is extremely simple. And within this user-friendliness, the design is meticulously crafted down to the smallest details. Under the concept of "combining Magnet and Gadget," "MaGdget" aims to make daily life smarter and more comfortable.
•HP: https://magdget.com/
•Instagram: https://www.instagram.com/magdget/
•YouTube: https://www.youtube.com/@MaGdget
•X: https://x.com/MaGdget
•TikTok: https://www.tiktok.com/@magdget_official
•LINE: https://page.line.me/492ysmbt
Company Profile
Company Name: Sincere Co., Ltd.
Headquarters: 3-3-21 Nipponbashi, Naniwa-ku, Osaka
Representative: Jun Nishimori, Representative Director
Capital: 10,000,000 JPY
Business: Planning, production, sales, and design of original products
HP: https://www.sincere-inc.jp/
Instagram: https://www.instagram.com/sincere_smilelifegift/
X (formerly Twitter): https://twitter.com/sincere_inc_jp
YouTube: https://www.youtube.com/@sincereincwatch
In recent years, with the proliferation of smartphones and laptops, carrying mobile batteries has become a daily routine. However, thermal runaway and sudden ignition accidents due to impact or degradation of lithium-ion batteries continue to be a social issue both in Japan and abroad. Against this backdrop, we developed this product as a "shelter for mobile batteries" to minimize the spread of fire to belongings in a bag or surrounding furniture in the event of an abnormal ignition.
■ World-Class Safety Recognized by International Accreditation Body ilac-MRA
This product has passed rigorous type testing conducted by a third-party inspection body accredited by ilac-MRA, an international accreditation organization whose test results are mutually recognized worldwide. In scenarios involving the most dangerous battery short-circuits and overcharging, its high containment performance has been officially certified to prevent flames or liquid leakage from escaping, even if a severe fire or smoke occurs inside the bag.
■ Instantaneous Fire Resistance up to 1000°C, Amazing 3-Layer Structure Technology
In safety tests, the bag showed no penetration or combustion after being exposed to an 800°C flame for 30 seconds. With an instantaneous fire resistance temperature of up to 1000°C and a long-term heat resistance of 550°C, it is equipped to handle ignition accidents. The uniquely designed tough 3-layer fabric completely blocks heat, thoroughly eliminating the risk of fire spreading to the surroundings.
■ Peace of Mind When Flying. A New Habit for In-Flight Emergencies
In recent years, regulations for carrying mobile batteries on aircraft have become stricter, and an in-flight fire incident can lead to a major accident. This product safely protects batteries up to the 20,000mAh class, which meets in-flight carry-on standards. It prepares for the risk of thermal runaway due to pressure changes or impacts at high altitudes, providing a journey of reassurance without inconveniencing others in the confined cabin space. It is a reliable partner for business trips and overseas travel, becoming a new standard safety item in your cabin bag.
■ Preparing for "Unnoticeable Ignition" During Sleep. A Safe Place to Protect Vulnerable Nighttime Hours
Troubles with lithium-ion batteries can occur without warning, even while we are in a deep sleep. During sleep, it is most difficult to notice abnormalities such as smoke or strange odors, making response times slower and leaving us very vulnerable. By storing your mobile battery in this product as its "nighttime spot" after a day's use, you can completely contain any potential incidents inside the bag while you sleep, quietly protecting your beloved family and home until morning.
■ EC-Exclusive 4-Layer Structure and Smart Magnetic Closure
While the standard version has a 3-layer structure, the e-commerce exclusive model has been upgraded to an extra-thick "4-layer structure" with an added silicone sheet. Furthermore, the closure has been changed from the standard Velcro version to a smart magnetic closure.
Although the standard 3-layer Velcro version is the one that has cleared the strict tests of international organizations, the magnetic version further improves sealing power and heat-shielding performance. It achieves both intuitive ease of use and high safety for securely containing flames.
■ Color Variations
We offer two stylish colors that blend into any daily scene. A chic black that pairs well with business bags and gadget pouches, and a sophisticated gray that looks beautiful with casual attire and brightly toned belongings.
■ SPEC
Selling Price (excl. tax) ¥2,000 [Magnet Ver. EC Exclusive] ¥1,800 [Velcro Ver.]
Body Size: Approx. 132×180×10mm
Weight: Approx. 105g [Magnet Ver. EC Exclusive] Approx. 55g [Velcro Ver.]
Material: Liquid silicone, fiberglass cloth, fireproof steel wire thread, No. 5 nylon resin zipper, magnet
Max Storage Size: Approx. 100 × 70 × 35 mm
Instantaneous Fire Resistance Temp: 1000°C
Long-term Heat Resistance Temp: 550°C
Purchase Sites
Official Site: https://magdget.com/products/esp02300
Amazon: https://www.amazon.co.jp/dp/B0GVSKV7TL
Rakuten: https://item.rakuten.co.jp/sincere-watch/esp02300/?l-id=shoptop_widget_filtered_item_list
ZOZOTOWN: https://zozo.jp/shop/sincere/goods/106233952/?did=170151746
■ Disclaimer
・This product does not prevent battery accidents from occurring.
・Safety is not guaranteed for all batteries.
・Test results are based on evaluations under specific conditions, and results may vary depending on usage conditions and battery state.
・As this product is not completely sealed, smoke or fire may leak from the zipper or fabric gaps in the event of an ignition. Do not place flammable items nearby.
・If a battery is stored in this product, avoid leaving it in high-temperature, high-humidity environments such as inside a car or in direct sunlight, and refrain from charging the battery while it is stored.
・Depending on the combination of length, width, and thickness, some devices may not fit. Please check the size of your device beforehand.
・While this product is designed to suppress external fire spread, the case itself may become hot due to the heat from an internal ignition. If an internal fire is suspected, do not touch the case directly until it has cooled sufficiently, and handle it with caution after ensuring the safety of the surroundings.
・The various safety performance and certification tests for this product were conducted and obtained with a similar model featuring a Velcro closure.
■About MaGdget
"MaGdget" is a portmanteau of Magnet and Gadget, a brand launched from Japan to the world. With Apple's MagSafe charging gaining attention, the demand for magnet-based gadgets is increasing. We believe that by skillfully combining magnets and gadgets, new possibilities can be born, reducing stress and effort. While equipped with unprecedented functions, their use is extremely simple. And within this user-friendliness, the design is meticulously crafted down to the smallest details. Under the concept of "combining Magnet and Gadget," "MaGdget" aims to make daily life smarter and more comfortable.
•HP: https://magdget.com/
•Instagram: https://www.instagram.com/magdget/
•YouTube: https://www.youtube.com/@MaGdget
•X: https://x.com/MaGdget
•TikTok: https://www.tiktok.com/@magdget_official
•LINE: https://page.line.me/492ysmbt
Company Profile
Company Name: Sincere Co., Ltd.
Headquarters: 3-3-21 Nipponbashi, Naniwa-ku, Osaka
Representative: Jun Nishimori, Representative Director
Capital: 10,000,000 JPY
Business: Planning, production, sales, and design of original products
HP: https://www.sincere-inc.jp/
Instagram: https://www.instagram.com/sincere_smilelifegift/
X (formerly Twitter): https://twitter.com/sincere_inc_jp
YouTube: https://www.youtube.com/@sincereincwatch