Altech’s (ASX: ATC) CERENERGY® Battery Demonstrates 28-Year Shelf Life

May 21, 2025 10:00 AM AEST | By Aditi Sarkar

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Altech’s (ASX: ATC) CERENERGY® Battery Demonstrates 28-Year Shelf Life — Image source: Company update

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Highlights

Altech Batteries has confirmed the exceptional long-term shelf life and performance reliability of its CERENERGY® sodium-nickel-chloride (Na Ni-Cl) battery technology.

The CERENERGY® technology is built on the proven sodium-nickel-chloride chemistry utilised in first-generation Zebra batteries.

CERENERGY® cells offer 250Wh capacity, more than double the energy of first-gen Zebra batteries.

Solid-state, sealed cell design ensures long-term stability.

On-demand activation at 270°C makes CERENERGY® ideal for defense and long-term energy reserves.

Specialty battery technology company Altech Batteries Limited (ASX:ATC, FRA: A3Y) has announced a remarkable milestone for its CERENERGY® sodium-nickel-chloride (Na Ni-Cl) battery technology, confirming its extraordinary long-term shelf life and performance reliability.

The CERENERGY® technology is built on the proven sodium-nickel-chloride chemistry utilised in first-generation Zebra batteries, which had smaller capacities of around 100Wh. In contrast, current CERENERGY® cells offer a significantly improved capacity of 250Wh while maintaining the same electrochemical foundation.

In a demonstration of durability, Altech successfully activated a 28-year-old Zebra battery originally produced by AEG ZEBRA in Berlin and left unused in storage since manufacture. Despite nearly three decades of dormancy, the battery exhibited no performance degradation, functioning as if it were brand new.

The longevity of the technology is credited to its solid-state design. While lithium-ion batteries rely on liquid electrolytes that degrade over time, CERENERGY® cells contain solid sodium aluminium chloride crystals and nickel powder sealed within a pressure-tight, hermetically closed unit. This structure prevents moisture ingress and chemical decay, allowing the batteries to remain inert and stable at ambient conditions.

When heat-activated to approximately 270°C, the 28-year-old cell immediately began operating without any loss in capacity, underscoring the potential for “on-demand activation.” This feature is particularly valuable for defense, emergency, and strategic reserve applications where long-term storage is essential.

To further validate the battery’s resilience, Altech’s joint venture partner, Fraunhofer IKTS, is currently conducting daily charge-discharge cycles on the vintage cell at 300°C within a 20–80% state of charge range (cell stress-testing program). The ongoing tests continue to confirm safe, stable, and full-capacity operation.

This breakthrough underscores the reliability, safety, and strategic utility of Altech’s CERENERGY® battery technology, marking a significant step forward in sustainable and long-life energy storage solutions.

ATC shares were trading at AUD 0.044 at the time of writing on 21 May 2025.

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