Graphene Manufacturing Group Ltd. (TSXV: GMG | OTCQX: GMGMF) announced on October 21, 2026, that it has commenced dispatching its fast-charging G®CELLS battery pouch cells to potential customers for early-stage performance testing and evaluation. The company states this step is consistent with its battery cell roadmap, which called for customer testing in 2026. The program spans multiple initial target sectors, including defence and heavy mobile equipment, and is being conducted in collaboration with Rio Tinto and the Battery Innovation Center of Indiana.

Key Points

  • Graphene Manufacturing Group Ltd. (TSXV: GMG | OTCQX: GMGMF) announced its G®CELLS customer sampling program
  • GMG has dispatched the first set of approximately 1.5 Ah pouch format cells, with over 100 G®CELLS expected to be sent before the end of 2026
  • G®CELLS remain at Battery Technology Readiness Level 4; cells are pre-commercial evaluation samples only
  • Investors may be watching for market updates on customer test data and feedback as they become available

G®CELLS Dispatched to Defence and Heavy Equipment Sectors for Independent Evaluation

GMG states it has dispatched the first set of approximately 1.5 Ah pouch format G®CELLS, designed for six-minute charging, to a number of potential customers across initial target sectors. The cells were developed using battery materials manufactured at GMG's Brisbane Battery Development Centre and assembled by BIC Indiana. The company notes that the sampling program is intended to allow potential customers to independently evaluate characteristics such as fast-charge capability, cycle life, and energy efficiency under their own test protocols — and to provide feedback that will guide ongoing cell development, optimisation, and scale-up. The cells are described as pre-commercial evaluation samples not intended for use in commercial products.

Recent Laboratory Performance Results Underpin the G®CELLS Sampling Launch

The customer sampling follows GMG's battery performance announcement on October 8, 2026, in which BIC Indiana data showed that G®CELLS cycled with no performance reduction after 1,000 cycles while being charged and discharged in six minutes, achieved an energy density of 58 Wh/kg while being charged in six minutes — a 48% increase over the previously reported 39 Wh/kg — and demonstrated 94% energy efficiency at high charge and discharge rates, compared with 64% for a tested Lithium Titanate Oxide cell. GMG cautions that these results were generated in a laboratory setting and that performance in customer testing may differ depending on operating conditions and application requirements.

G®CELLS Remain at BTRL 4 With Path to Higher Readiness Levels Anticipated Through BIC Indiana Partnership

The company confirms that G®CELLS currently hold a Battery Technology Readiness Level of 4, meaning the cell technology has been demonstrated and validated in a laboratory environment. Through its collaboration with BIC Indiana, GMG anticipates the technology could ultimately progress to BTRL 7 and 8, noting that the equipment and processes used to produce G®CELLS are consistent with those employed in lithium-ion battery manufacturing. However, the company provides no definitive timeline and offers no assurance that BTRL 7 or 8 will be achieved. GMG states it will update the market on material outcomes of the customer testing programs as appropriate.