Maxell Develops ER Battery-Sized All-Solid-State Battery Module Supporting Wireless Charging*1

Tue, August 25, 2026 at 12:01 PM UTC

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TOKYO--(BUSINESS WIRE)--Aug 25, 2026--

Maxell, Ltd. (TOKYO: 6810) has developed an all-solid-state battery module compatible with a 1/2AA-size (diameter 14.5 mm, height 25.2 mm) lithium thionyl chloride battery (hereinafter ER battery), along with a dedicated charger *2. The module is available in two versions, one capable of operating at temperatures up to 125°C and the other up to 150°C.

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All-Solid-State Battery Module Supporting Wireless Charging and dedicated charger (Under development), Left: Module, Center: Internal Module Structure, Right: Dedicated charger

Currently, ER batteries are widely used in industrial equipment backup systems, smart meters, and IoT devices. However, because ER batteries are non-rechargeable, periodic battery replacement and the disposal of used batteries present ongoing operational challenges. The newly developed module integrates a wireless charging circuit, highly heat-resistant and highly reliable all-solid-state batteries, and a boost circuit into a 1/2AA-size, while delivering the same 3.6 V output voltage as conventional ER batteries. When used in combination with the dedicated charger *2, it enables wireless charging *1 capability to be added to existing equipment without requiring complex circuit design. By incorporating rechargeable all-solid-state batteries, the module helps reduce battery replacement work and minimize battery waste. In addition, its wireless charging *1 capability eliminates the need for openings in device housings for battery replacement or charging, making it suitable for equipment that requires a high degree of sealing performance.

One potential application of this module is temperature loggers for food used in the sterilization process of retort foods require both heat resistance and a high degree of sealing performance to prevent moisture ingress. Currently, Maxell is conducting a joint feasibility study with House Foods Corporation on a temperature logger for food process using this module.

*1 Wireless charging: This function may not be available depending on the enclosure material used in the customer’s equipment. *2 Dedicated charger: A dedicated design tailored to the customer’s equipment is required.

For more details, please refer to the information here.

Trademarks The names, logos, and service marks mentioned herein are registered trademarks or trademarks　of Maxell or their respective companies.

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CONTACT: Customer Inquiries

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Marketing & Sales Div., Maxell, Ltd.

marketing_sales@maxell.co.jpMedia Inquiries

Hitoshi Yamagata

PR&IR Dept., Maxell, Ltd.

hitoshi-yamagata@maxell.co.jp

KEYWORD: JAPAN ASIA PACIFIC

INDUSTRY KEYWORD: OTHER MANUFACTURING MOBILE/WIRELESS TECHNOLOGY OTHER ENERGY MANUFACTURING ENERGY FOOD/BEVERAGE BATTERIES HARDWARE RETAIL

SOURCE: Maxell, Ltd.

Copyright Business Wire 2026.

PUB: 08/25/2026 08:00 AM/DISC: 08/25/2026 08:01 AM

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