Altech Batteries Ltd CERENERGY Accredited Highest Possible Green Rating

Perth, Australia (ABN Newswire) - Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) (OTCMKTS:ALTHF) is pleased to announce the latest performance results of the CERENERGY(R) cell and battery pack prototypes. These results confirm the technological maturity and robustness of the CERENERGY(R) technology and mark another decisive step towards industrialisation.

Highlights

- 650+ cycles with no capacity loss, proving exceptional material stability and long operational lifespan compared to conventional batteries

- Near 100% Coulombic efficiency, confirming minimal side reactions and strong intrinsic safety of sodium nickel chloride chemistry

- High energy efficiency of up to 92%, surpassing typical 70-80% levels of competing battery technologies

- Proven safety under extreme conditions - cells remained stable during overcharge, deep discharge, and thermal cycling up to 300 degC with no gassing, leakage, or rupture

- Robust and reliable chemistry - sodium nickel chloride avoids flammable electrolytes and runaway risks, confirming suitability for safe, large-scale grid and renewable energy storage

- ABS60 prototype validated under real-world conditions -tested across diverse load profiles, high-current pulses up to 50 A, and thermal variations

- Stable, efficient performance - achieved ~88% round-trip efficiency with no observable capacity fade over 110+ cycles

CELL PERFORMANCE

The CERENERGY(R) prototype cells have successfully completed over 650 charge-discharge cycles without any detectable capacity loss. Cycle life is a critical measure of battery durability, as most conventional batteries experience gradual degradation with every cycle. Achieving such performance highlights the outstanding stability of the materials and points to the potential for a long operational lifespan.

For stationary energy storage systems (ESS), this translates into fewer battery replacements, lower lifetime operating costs, and greater reliability for end users.

The cells also delivered nearly 100% Coulombic efficiency alongside an energy efficiency of up to 92% across 650 cycles. Coulombic efficiency reflects the proportion of charge recovered during discharge relative to what was supplied during charging. A value approaching 100% indicates minimal side reactions or parasitic losses, confirming the intrinsic stability and safety of sodium nickel chloride chemistry. This high efficiency demonstrates that the cells are not expending energy on unwanted processes such as electrode degradation. Such performance is vital for scalability, ensuring reliable, longterm operation in commercial energy storage applications.

Energy efficiency represents the proportion of energy delivered relative to the energy supplied. Competing technologies, including conventional high-temperature batteries and many flow batteries, typically achieve only around 70-80%. By reaching 92%, CERENERGY(R) positions itself in a highly competitive class, offering more cost-effective energy storage, stronger economics for grid operators, and seamless compatibility with the requirements of renewable energy integration.

The cells achieved a nominal capacity of 100 Ah and 250 Wh, with reliable performance even at higher discharge rates. A key feature is their ability to support multiple daily charge-discharge cycles within the 20-80% state of charge (SoC) range at 25 A. This capability positions CERENERGY(R) as a highly flexible solution for grid operators and energy storage providers, enabling cost-efficient, long-life performance in applications that demand frequent cycling such as renewable integration, peak shaving, and backup power.

CERENERGY(R) prototype cells underwent rigorous abuse testing, including overcharge to 4 V, deep discharge to 0.2 V, and thermal cycling between room temperature and 300 degC. In all cases, the cells remained stable with no gassing, leakage, or rupture -clear proof of their outstanding safety. These results highlight the intrinsic stability of sodium nickel chloride chemistry, which avoids the flammable electrolytes and runaway risks common in lithium-ion batteries. The ability to withstand extreme electrical and thermal stress demonstrates CERENERGY(R)'s robustness and confirms its suitability for safe, largescale deployment in grid, renewable, and industrial energy storage applications. This was achieved over 3 cycles with 1.8 Full Charge Equivalent (FCE) into 22 hours.

BATTERY PACK ABS60 (60 kWh) PROTOTYPE

The first ABS60 battery pack prototype has been successfully validated under real-world operating conditions, marking a major step forward in product readiness. Testing included diverse load profiles,

continuous discharges at 25 A (equivalent to C-rate of C/4 (discharges in 4 hours), or one-quarter of the pack's rated capacity per hour) at 80% depth of discharge (DoD), short-duration high-current pulses up to 50 A, and carefully controlled thermal variations.

The pack consistently demonstrated stable performance, achieving ~88% round-trip efficiency while maintaining reliable thermal management. Efficiency refers to the proportion of input energy that can be retrieved during operation-a critical measure of economic viability for large-scale storage. Over more than 110 cycles, results showed no observable capacity fading and only a slight increase in internal resistance. Capacity fading refers to the gradual decline in usable energy over repeated cycles, while internal resistance influences power delivery and heat generation.

The absence of meaningful degradation confirms the durability and electrochemical stability of the ABS60 design. These outcomes are highly significant as they demonstrate that the pack can withstand real-world duty cycles while retaining performance and efficiency, translating into longer service life, fewer replacements, and lower total cost of ownership.

For grid operators and renewable integration projects, this combination of robust cycling capability, efficiency, and thermal stability underscores the ABS60's commercial readiness and competitive advantage in the stationary energy storage market.

These results are a strong confirmation of CERENERGY(R)'s technological leadership and a clear signal of the technology's competitiveness and robustness for future applications in energy storage and industrial markets.

Group Managing Director, Iggy Tan said "These results confirm CERENERGY(R)'s robustness and readiness for market adoption. Demonstrating long cycle life, high efficiency, and unmatched safety, we are now strongly positioned to deliver a competitive and sustainable alternative for grid and industrial energy storage."

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About Altech Batteries Ltd:

Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) is a specialty battery technology company that has a joint venture agreement with world leading German battery institute Fraunhofer IKTS ("Fraunhofer") to commercialise the revolutionary CERENERGY(R) Sodium Alumina Solid State (SAS) Battery. CERENERGY(R) batteries are the game-changing alternative to lithium-ion batteries. CERENERGY(R) batteries are fire and explosion-proof; have a life span of more than 15 years and operate in extreme cold and desert climates. The battery technology uses table salt and is lithium-free; cobalt-free; graphite-free; and copper-free, eliminating exposure to critical metal price rises and supply chain concerns.

The joint venture is commercialising its CERENERGY(R) battery, with plans to construct a 100MWh production facility on Altech's land in Saxony, Germany. The facility intends to produce CERENERGY(R) battery modules to provide grid storage solutions to the market.

Perth, Australia (ABN Newswire) - Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) (OTCMKTS:ALTHF) is pleased to announce that it has received EUR1M in funds from the remaining Bearer Bond facility in place with major shareholder Deutsche Balaton. The original facility was for EUR2.5M and this has now been adjusted by mutual agreement to EUR2M. The full EUR2M has now been drawn down.

As announced to the ASX on 25 March 2025, the Company advised that it is in the process of selling its Malaysian land to help fund the ongoing development of the CERENERGY(R) battery project and the Silumina Anodes(TM) battery materials project, as well as to support general working capital requirements.

The Company also announced that it had entered into a binding Bond Note Subscription Deed with its major shareholder Deutsche Balaton AG, under which Altech could drawdown up to EUR2.5M in cash in the form of interest-bearing Bearer Bonds.

As the Bond Note Subscription Deed involved the Company granting a security interest over the Company's Malaysian land, shareholder approval was required. The Company convened a General Meeting on 13 May 2025 and shareholders approved all Resolutions put to the General Meeting. The Company then applied to have the Malaysian land security registered with the relevant land authority, being Johor Corp. Although there were no laws or regulations precluding Johor Corp from registering the land security, it considered Deutsche Balaton AG a 'non-lending foreign entity' and advised that accordingly it was not comfortable in registering the land security.

The Company's wholly owned subsidiary Altech Chemicals Sdn. Bhd. is the holder of the lease agreement over the Malaysian land. The only asset of value within Altech Chemicals Sdn. Bhd. is the lease agreement over the Malaysian land. In order to provide the security to Deutsche Balaton AG so as to drawdown the Bearer Bonds, the Company enforced security over the shares of Altech Chemicals Sdn. Bhd. in favour of Deutsche Balaton AG in lieu of the land security.

On 20 August 2025, the Company's wholly owned subsidiary Altech Chemicals Australia Pty Ltd (shareholder of Altech Chemicals Sdn. Bhd.) executed a Share Charge with Deutsche Balaton AG in connection with the Bond Note Subscription Deed. Pursuant to the Share Charge, Altech Chemicals Australia Pty Ltd has offered as a continuing Security for the due and punctual payment of all the requirements of the Bond Note Subscription Deed, charged all its rights, title and interest to all of the shares held in Altech Chemicals Sdn. Bhd. in favour of Deutsche Balaton AG. The Security is a continuing security and will extend to the ultimate balance of the due and punctual payment of all the requirements of the Bond Note Subscription Deed.

On 20 August 2025, the Company executed an Amendment Deed to the Bond Note Subscription Deed. Under the terms of the Amendment Deed, the agreed amount of bonds available to be drawdown was reduced from EUR2.5M to EUR2.0M. Additionally, the Company's Meckering land was offered as additional security for the due and punctual payment of all the requirements of the Bond Note Subscription Deed.

Altech Meckering Pty Ltd, the Company's wholly owned subsidiary and holder of the Meckering land, has entered into a mortgage over the Meckering Land in favour of Deutsche Balaton AG as a continuing Security for the due and punctual payment of all the requirements of the Bond Note Subscription Deed.

About Altech Batteries Ltd:

Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) is a specialty battery technology company that has a joint venture agreement with world leading German battery institute Fraunhofer IKTS ("Fraunhofer") to commercialise the revolutionary CERENERGY(R) Sodium Alumina Solid State (SAS) Battery. CERENERGY(R) batteries are the game-changing alternative to lithium-ion batteries. CERENERGY(R) batteries are fire and explosion-proof; have a life span of more than 15 years and operate in extreme cold and desert climates. The battery technology uses table salt and is lithium-free; cobalt-free; graphite-free; and copper-free, eliminating exposure to critical metal price rises and supply chain concerns.

The joint venture is commercialising its CERENERGY(R) battery, with plans to construct a 100MWh production facility on Altech's land in Saxony, Germany. The facility intends to produce CERENERGY(R) battery modules to provide grid storage solutions to the market.

Perth, Australia (ABN Newswire) - Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) (OTCMKTS:ALTHF) is pleased to announce that it has received official written confirmation for the grant qualification of the CERENERGY(R) sodium-chloride solid-state battery project in Saxony, Germany to the value of 30% of the total capital expenditure excluding working capital, financing cost and interest during construction amounting to EUR46,725,802.

Highlights

- Altech Batteries GmbH's CERENERGY(R) battery project has been approved by Germany's Ministry of Economic Affairs and Energy as eligible for Grant receipt under the "STARK"(1) economic development program

- Altech Batteries GmbH's CERENERGY(R) battery project passed the second stage of Government approval for a 30% CAPEX grant in the amount of 46.7 million Euro

- The grant approval is not yet final and conditional and subject to overall financial close and the availability of funds to be approved by the German parliament as part of the 2026 Government Budget

(1) STARK - Starkung der Transformationsdynamik und Aufbruch in den Revieren und an den Kohlekraftwerkstandorten

The STARK program supports projects that support the transformation process towards an ecologically, economically, and socially sustainable economic structure in the coal regions and is initiated by the German Federal Government and supported by the EU

Altech has been actively applying for various grants offered by the State of Saxony, Federal Government of Germany, and the European Union. The State of Saxony and Brandenburg, along with the European Union, offer substantial support for renewable energy projects, including grants under the STARK program aimed at converting lignite coal to renewable energy sources. These grants are part of broader efforts to transition regions dependent on fossil fuels toward sustainable energy solutions. Altech's site, located in these areas, stands to benefit from various funding programs designed to support clean energy projects, including EU grants for energy transformation and innovation.

Having now received written confirmation of the STARK program for the CERENERGY(R) project, it is a great sign of support and a recognition of this innovative battery technology jointly undertaken by Altech and the Fraunhofer Gesellschaft.

About Altech Batteries Ltd:

Altech Batteries Limited (ASX:ATC,OTC:ALTHF) (FRA:A3Y) is a specialty battery technology company that has a joint venture agreement with world leading German battery institute Fraunhofer IKTS ("Fraunhofer") to commercialise the revolutionary CERENERGY(R) Sodium Alumina Solid State (SAS) Battery. CERENERGY(R) batteries are the game-changing alternative to lithium-ion batteries. CERENERGY(R) batteries are fire and explosion-proof; have a life span of more than 15 years and operate in extreme cold and desert climates. The battery technology uses table salt and is lithium-free; cobalt-free; graphite-free; and copper-free, eliminating exposure to critical metal price rises and supply chain concerns.

The joint venture is commercialising its CERENERGY(R) battery, with plans to construct a 100MWh production facility on Altech's land in Saxony, Germany. The facility intends to produce CERENERGY(R) battery modules to provide grid storage solutions to the market.