GMG Announces 48% Increase in Energy Density, Doubling of Cycle Life and 94% Energy Efficiency for 6 Minute Fast Charge

BRISBANE, AUS, Oct 8, 2026 – (ACN Newswire) – Graphene Manufacturing Group Ltd. (TSXV: GMG) (OTCQX: GMGMF) (“GMG” or the “Company“is pleased to offer the current development upgrade on the next generation graphene battery innovation being established by GMG under a Joint Development Agreement with Rio Tinto, among the world’s biggest metals and mining groups, and with the assistance of the Battery Innovation Center of Indiana (“BIC”in the United States of America.

GMG is pleased to share the following biking information of GMG’s quick charging G ® CELLS (1.5 Ah cells with 6 minute charging) as seen in Figure 1, with energy density and energy effectiveness charts displayed in Figure 2. This information was gathered by the BIC on cells that were made by the BIC with products that were established, made and provided by GMG in its Brisbane Battery Development Centre.

Figure 1 reveals that G ® CELLS have actually cycled without any efficiency decrease after 1000 cycles, as at October 7^th 2026, which is a doubling of cycle life considering that the previous GMG battery efficiency statement¹in spite of being charged and released in 6 minutes (at 7C). Figure 1 likewise reveals the efficiency of a widely known Lithium Titanate Oxide (LTO) battery which, when charged and released at the exact same time of 6 minutes (at 10C) deteriorated to 80% of initial capability (which is generally the stated end of life of a cell) within 82 cycles. Another G ® CELL was likewise charged and released in 6 minutes (at 10C) and signed up just a 10% decrease after 393 cycles. The G ® CELLS efficiently last 10 times longer whilst being charged and released in the very same time.

Figure 1: GMG G ® CELLS and LTO Cycling Data

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Figure 2 reveals a 48%boost of the energy density of 58 Wh/kg whilst being charged in 6 minutes (at 10C) over previous reported energy density of 39 Wh/kg in GMG’s previous battery efficiency statement¹

The G ® CELLS Reveal a 94% energy effectiveness which is high specifically at such a high charge and discharge rate – when compared to the 64% energy performance of the checked LTO.

Figure 2: GMG G ® CELLS and LTO Energy Density and Energy Efficiency Data

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Bob GalyenGMG Director and previous Chief Technology Officer of CATL, commented: “The cycling stability we are seeing from these G®CELLS is genuinely exceptional. Reaching 1,000 cycles with no performance reduction, while every cycle is charged and discharged in six minutes, stands in stark contrast to the LTO benchmark cell. LTO is regarded as one of the most robust fast-charging chemistries on the market today, yet it degraded to 80% of its original capacity within 82 cycles under the same six-minute charge and discharge time. Just as important is the 94% energy efficiency at these high rates, compared with 64% for the LTO cell. Energy that isn’t lost as heat is what makes fast charging practical at the system level. Having built and scaled battery manufacturing for the world’s largest lithium-ion producer, I know how rare it is to see fast-charge durability, high efficiency and rising energy density together this early in a cell’s development. There is further work ahead on extending cycle life at 10C and scaling the cell size, but the fundamentals being demonstrated here are the right ones to be solving first.”

Craig NicolChief Executive Officer and Managing Director of GMG, commented: “This data set from BIC is an important proof point for our graphene battery program. Since our last update we have doubled cycle life to 1,000 cycles with no performance reduction and lifted energy density by 48% to 58 Wh/kg at a 10C charge rate. We have also achieved 94% energy efficiency, all while charging and discharging in six minutes. Fast charging is one of the biggest barriers to broader electric vehicle and energy storage adoption. These results show G®CELLS lasting around ten times longer than a comparable LTO cell charged and discharged in the same time. Our focus now is on continuing to improve energy density and 10C cycle life, and on scaling to larger cell formats. I want to thank the team at BIC and our partners at Rio Tinto for their continued collaboration as we progress this technology along the roadmap.”

Jack PerkowskiChairman of GMG, commented: “Battery development of this kind requires patient capital, disciplined engineering and world-class partners, and this update reflects progress on all three fronts. Since our last update, cycle life has doubled and energy density has risen by 48%. This data was generated by BIC, an organisation with over 10 years of experience and more than 500 battery development projects behind it, on cells built with GMG’s graphene materials. That gives the Board real confidence in the direction of this program. Combined with the ongoing support of Rio Tinto, I believe GMG is building the right foundations to advance this technology toward commercial relevance. The Board will continue to support management as they work through the optimisation and scale-up steps ahead.”

Please see the following web page for more information about the graphene batteries: https://graphenemg.com/graphene-products/gcells/The G ® CELLS remain in pouch format-as seen in Figure 3. The launch video link for G ® CELLS is displayed in Figure 4.

Figure 3: G Cell Pouch Cell Battery

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Figure 4: G ® CELLS Release Video

Release video: https://youtu.be/pfHhh5-TLyU

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Introduce video: https://youtu.be/pfHhh5-TLyU

About BIC:
BIC is a collective effort developed to integrate management from distinguished universities, federal government companies, and companies. BIC is a public-private collaboration and a not-for-profit company concentrating on the fast advancement, screening and commercialization of safe, trusted and light-weight energy storage systems for defense and business consumers. BIC is a distinct company that has actually been leading battery cell advancement for world leading battery business for over 10 years and has actually performed over 500 battery advancement jobs.

About GMG
GMG is an Australian based clean-technology business which establishes, makes and offers energy conserving and energy storage options, made it possible for by graphene produced by means of in home production procedure. GMG utilizes its own exclusive production procedure to disintegrate gas (i.e. methane) into its natural components, carbon (as graphene), hydrogen and some recurring hydrocarbon gases. This procedure produces high quality, low expense, scalable, ‘tuneable’ and low/no pollutant graphene ideal for usage in clean-technology and other applications.

The Company’s present focus is to de-risk and establish industrial scale-up abilities, and protected market applications. In the energy cost savings section, GMG has actually at first concentrated on graphene boosted heating, ventilation and a/c (“HVAC-R”covering (or energy-saving finish) which is now being marketed into other applications consisting of electronic heat sinks, commercial procedure plants and information centres. Another item GMG has actually established is the graphene lube additive concentrated on conserving liquid fuels at first for diesel motor. GMG has actually likewise established a graphene water based coolant additive concentrated on increasing heat transfer and lowering bacterial development in cooling water circuits.

In the energy storage section, GMG is working collaboratively with financial backing from the Australian Government to advance R&D and commercialization of GMG Graphene Batteries. GMG has actually likewise established a graphene additive slurry that is intended to enhance the efficiency of lithium-ion batteries.

GMG’s 4 vital organization goals are:

1. Produce Graphene and improve/scale cell production procedures
2. Build Revenue from Energy Savings Products
3. Establish Next-Generation Battery
4. Establish Supply Chain, Partners & & Project Execution Capability

www.graphenemg.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is specified in the policies of the TSX Venture Exchange) accept obligation for the adequacy or precision of this press release.

Cautionary Note Regarding Forward-Looking Statements

This press release consists of particular declarations and info that might make up positive details within the significance of relevant Canadian securities laws. Positive declarations associate with future occasions or future efficiency and show the expectations or beliefs of management of the Company concerning future occasions. Typically, positive declarations and details can be recognized by the usage of positive terms such as “intends” “expects” or “anticipates”or variations of such words and expressions or declarations that specific actions, occasions or outcomes “may” “could” “should” “would” or will “potentially” or “likely” take place. This info and these declarations, described herein as “forward‐looking statements”are not historic realities, are made since the date of this press release and consist of, without restriction:

• declarations that GMG Graphene Batteries are safe and quick charging, which graphene can be utilized to increase their efficiency and cycle life;
• declarations concerning the Company’s capability to more enhance the energy density, cycle life (consisting of at a 10C charge rate) and energy effectiveness of G ® CELLS, and to scale the cell size;
• GMG’s objectives to establish industrial scale-up abilities;
• GMG’s focus in the energy cost savings sector;
• GMG’s intents for using graphene lube additive on conserving liquid fuels;
• expectations for R&D and commercialisation of Graphene Batteries;
• GMG’s capability to enhance the efficiency of lithium-ion batteries;
• declarations credited to Bob Galyen, Craig Nicol and Jack Perkowski relating to the significance of the BIC biking, energy density and energy effectiveness information, the Company’s innovation, collaborations and business potential customers; and
• the Company’s 4 crucial organization goals.

Such positive declarations are based upon a variety of presumptions of management, consisting of, without restriction:

• presumptions that GMG Graphene Batteries can be produced at lower expense;
• presumptions regarding charging time, energy density, energy effectiveness, life process, security, thermal runaway danger and the requirement for a thermal management system for GMG Graphene Batteries, and the speed and stability of charging;
• that G ® CELLS will continue to cycle without product efficiency decrease beyond the cycles reported in this press release;
• that GMG Graphene Batteries will advance to BTRL 7 and 8;
• that a variety of international business in a range of markets will have an interest in dealing with GMG;
• that the battery pack style will be plastic and deal weight, expense and intricacy benefits to a metal case and increased energy density;
• that the service arrangement with the BIC will make it possible for the Company to enhance its cell style and battery production devices;
• that the Company will have the ability to additional enhance energy density and 10C cycle life, and scale the cell size, as expected; and
• that the Company will have the ability to fulfill its general timeline on the battery cell roadmap.

In addition, positive info includes a range of recognized and unidentified threats, unpredictabilities and other aspects which might trigger the real strategies, intents, activities, outcomes, efficiency or accomplishments of GMG to be materially various from any future strategies, objectives, activities, outcomes, efficiency or accomplishments revealed or indicated by such positive declarations. Such dangers consist of, without constraint:

• that GMG Graphene Batteries can not be produced at lower expense, or that any of the presumptions regarding charging time, energy density, energy performance, life process, scaling of the cell size, security, thermal runaway threat and the requirement for a thermal management system for GMG Graphene Batteries can not be attained;
• that GMG Graphene Batteries do not provide anticipated speed and stability of charging;
• that biking screening, which is continuous as at October 7, 2026, will reveal efficiency decrease in later cycles;
• that GMG Graphene Batteries will not advance to BTRL 7 and 8;
• that a variety of worldwide business in a range of markets will not have an interest in dealing with GMG;
• that the battery pack style will not be plastic and will not provide weight, expense and intricacy benefits to a metal case and increased energy density;
• that the Company will not have the ability to enhance the electrochemical behaviour of the pouch cell through lab experimentation or at all;
• that the Company will not have the ability to additional enhance energy density or 10C cycle life, or scale the cell size, as expected or at all;
• that the Company will not have the ability to satisfy its total timeline on the battery cell roadmap;
• that the service contract with the BIC will not allow the Company to enhance its cell style and battery production devices;
• that additional screening or larger-format cells will not reproduce the biking, energy density or energy effectiveness performance reported in this press release;
• that the Joint Development Agreement with Rio Tinto will not advance the terms or timeline presently expected;
• that GMG’s operations might be negatively impacted by possible future federal government legislation, policies and controls, by modifications in appropriate laws and guidelines, or by the failure to acquire all required regulative approvals;
• that public health crises such as pandemics might negatively affect GMG’s service and the capability of the Company to establish its items;
• the volatility of international capital markets;
• political instability;
• the failure of GMG to draw in and keep experienced workers;
• unanticipated advancement and production difficulties;
• that GMG might deal with innovation or software application disturbances;
• unexpected expenses;
• threats associating with the level and period of the disputes in Eastern Europe and the Middle East and their influence on worldwide markets;
• that the Company will be not able to establish, market, and offer its items as presently expected;
• that the Company will be not successful in recognizing and engaging tactical partners;
• that the Company will be not able to obtain devices to improve its production procedure, or that the growth of its production centers will not lead to the advantages presently anticipated;
• that business presently dealing with GMG, or celebrations that have actually participated in NDA plans with the Company, will not have an interest in acquiring the Company’s items;
• that GMG’s items might not carry out as prepared for or provide the anticipated business advantages;
• that GMG’s exclusive production procedures might not offer an option to conventional graphite supply chains;
• that the Company will be not able to grow its sales or incomes as expected;
• that third-party market information and market forecasts will not be precise as provided; and
• the danger elements set out under the heading “Risk Factors” in the Company’s yearly details kind dated November 04, 2025, offered for evaluation on the Company’s profile at www.sedarplus.ca

Management of the Company has actually tried to recognize crucial aspects that might trigger real outcomes to vary materially from those consisted of in positive declarations or positive details, there might be other aspects that trigger results not to be as prepared for, approximated or meant. There can be no guarantee that such declarations will show to be precise, as real outcomes and future occasions might vary materially from those prepared for in such declarations. Appropriately, readers ought to not put unnecessary dependence on positive declarations and positive details. Readers are warned that dependence on such details might not be proper for other functions. The Company does not carry out to upgrade any positive declaration, positive details or monetary outlook that is integrated by recommendation herein, other than in accordance with appropriate securities laws.

¹https://graphenemg.com/gmg-announces-long-life-battery-cycling-data/

To see the source variation of this news release, please see https://www.newsfilecorp.com/release/318037

Subject: Press release summary

Source: Graphene Manufacturing Group Ltd

Sectors: Metals & & Mining, Engineering, Manufacturing

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