# GMG Announces Long Life Battery Cycling Data

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/gmg-announces-long-life-battery-cycling-data--b9e56866-b521-496c-905b-504d7dd764b1

Original source: https://orestocks.com/company/GMG.V/press-releases/8808230388631606

Publisher: orestocks

Original announcement: 2026-09-09T12:34:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Graphene Manufacturing Group Ltd.

- Ticker: GMG.V

- Exchange: Unavailable

- Region: Queensland, Australia

- Primary commodity: Lithium

- Secondary commodities: None reported

- Document categories: Metallurgy

- Extracted: 2026-09-09 13:03:29 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

GMG has released cycling data for its G®CELLS graphene battery technology, showing no performance degradation after 489 fast-charge cycles. The cells exhibited very low resistance and minimal temperature increase compared to Lithium Titanate Oxide \(LTO\) benchmarks, although energy density is currently below the company's long-term target.

Reasoning: The company demonstrated exceptional fast-charging durability and thermal performance in G®CELLS compared to LTO benchmarks, though energy density remains a work in progress.

- Positive factor: exceptional cycling stability \(489 cycles with no degradation\)

- Positive factor: very low internal resistance \(5 mOhms\)

- Positive factor: minimal temperature rise \(4C above ambient\)

- Positive factor: independent validation by BIC

- Negative factor: energy density is currently unoptimized \(39 Wh/kg vs target 50 Wh/kg\)

Facts used in scoring: 2

## Classification and evidence

**Bench Scale Only**

Polarity: negative

Definition: Only preliminary bench tests completed — no locked-cycle or pilot work.

Why it applies: Data is from cell-level testing at the BIC, representing early-stage development rather than pilot or commercial scale.

Evidence · text

> this is unoptimized and the Company believes it can bring this energy density back up

**Mill Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: the document describes a mill\_cil route \("CIL"\)

**Multi-Domain Tested**

Polarity: positive

Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed.

Why it applies: 2 distinct composites were tested

## Extracted facts

Stored fact records: 2. Some facts used in scoring do not have a stored record.

## Metallurgical Results (2)

### cycling

[Link to this fact](https://atlas-staging.minestarters.com/news/gmg-announces-long-life-battery-cycling-data--b9e56866-b521-496c-905b-504d7dd764b1#fact-metallurgical-facts-0)

lithium

#### Identity

- Commodity: lithium
- Ticker: GMG.V

#### Test Work

- Program Status: preliminary
- Test Type: cycling
- Processing Route: 10C / 10C charge/discharge
- Sample: G®CELLS \(1 Ah cells, 10C/10C charge/discharge\)

#### Recovery

- Recovery Basis: unspecified

#### Reagents

- Reagent Notes: Very low resistance of ~0.005 Ohms \(5 mOhms\) allowed for a very low temperature increase of 4oC above ambient. Energy density of 39 Wh/kg.

#### Lab

- Laboratory: Battery Innovation Center of Indiana \(BIC\)

#### Location

- Loc. Confidence: medium

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-09-09T00:00:00.000Z

Reasoning: Exceptional cycling life and thermal stability demonstrated under fast-charge conditions.

- Positive factor: no performance reduction after 489 cycles

- Positive factor: low resistance \(5 mOhms\)

- Positive factor: low temperature rise \(4C\)

- Negative factor: energy density \(39 Wh/kg\) is unoptimized

Evidence · text

> G®CELLS have cycled with no performance reduction after 489 cycles

### cycling

[Link to this fact](https://atlas-staging.minestarters.com/news/gmg-announces-long-life-battery-cycling-data--b9e56866-b521-496c-905b-504d7dd764b1#fact-metallurgical-facts-1)

lithium

#### Identity

- Commodity: lithium
- Ticker: GMG.V

#### Test Work

- Program Status: preliminary
- Test Type: cycling
- Processing Route: 10C / 10C charge/discharge
- Sample: LTO \(Lithium Titanate Oxide\) benchmark cell

#### Recovery

- Recovery Basis: unspecified

#### Reagents

- Reagent Notes: Degraded to 86% of original capacity within 64 cycles. Resistance up to 0.030 Ohms. Temperature increase of 19C above ambient.

#### Lab

- Laboratory: Battery Innovation Center of Indiana \(BIC\)

#### Location

- Loc. Confidence: medium

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-09-09T00:00:00.000Z

Reasoning: Used as a benchmark to demonstrate the superior durability of G®CELLS.

- Negative factor: rapid degradation \(86% capacity in 64 cycles\)

Evidence · text

> LTO battery which... degraded to 86% of original capacity... within 64 cycles

## How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.