Li-S Energy (ASX:LIS) Demonstrates Lithium-Sulfur Battery Performance in Pegasus Long-Endurance Drone Flight

Sonal Goyal

30 September 2026 02:23 PM AEST

Li-S Energy (ASX:LIS) Demonstrates Lithium-Sulfur Battery Performance in Pegasus Long-Endurance Drone Flight

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Key Highlights

Li-S Energy Ltd (ASX:LIS) announced successful test flights of the EATP Pegasus long-endurance drone powered by a single lithium-sulfur battery pack.
The Pegasus completed an endurance flight of almost two hours and travelled more than 75 kilometres during testing in Queensland.
The lithium-sulfur battery system delivered higher range and flight time on a same-cell-weight basis compared with an equivalent lithium polymer UAV battery pack.
The collaboration partners are assessing future commercial development opportunities for long-endurance drone platforms.

Li-S Energy Ltd (ASX:LIS) is an Australian battery technology company developing lithium-sulfur battery cells for applications including defence, drones and aviation. The company’s shares were trading at AUD 0.14 on 30 September 2026 at 1:28 pm. Li-S Energy has announced successful flight testing of the EATP Pegasus long-endurance drone, which uses the company’s lithium-sulfur battery system alongside technologies developed by V-TOL Aerospace and Halocell Energy.

Pegasus Drone Completes Endurance Flight Testing

The EATP Pegasus drone has completed a series of test flights in Queensland, including an endurance flight of almost two hours powered by a single Li-S Energy lithium-sulfur battery pack.

The flight covered more than 75 kilometres, with the aircraft completing the planned performance requirements and landing with remaining battery capacity.

The Pegasus platform combines V-TOL Aerospace’s airframe and power systems, Li-S Energy’s lithium-sulfur battery packs and battery management system, and Halocell Energy’s perovskite solar array technology.

The project was developed under the Emerging Aviation Technology Partnership (EATP) programme, supported by a Commonwealth Government grant of more than $1.35 million, matched by the collaboration partners.

Lithium-Sulfur Battery System Performance

The Pegasus drone uses Li-S Energy’s 382 Wh lithium-sulfur battery packs and integrated battery management system. During testing, the system supplied power to the drone’s twin motors and control systems while also managing input from the solar array.

Li-S Energy stated that, on a same-cell-weight basis, its lithium-sulfur cells delivered 80% more range and flight time compared with an equivalent high-performance professional lithium polymer UAV battery pack.

The company noted that the comparison was based on the 1.1kg lithium-sulfur power cells used during the endurance flight and excluded battery pack housing and battery management system weights.

The successful flight test provides operational data for assessing the performance of the integrated battery and aircraft platform.

Future Long-Endurance Drone Applications

The Pegasus platform has been designed to accommodate two Li-S Energy battery packs. With future improvements to Halocell Energy’s solar array performance, the platform is expected to target flight durations of five to eight hours and travel distances of up to 250 kilometres.

The potential applications identified by the collaboration partners include long-endurance mapping, surveillance, agricultural monitoring, utilities inspection and environmental monitoring.

Following the completion of flight testing, the partners intend to analyse performance data and assess further commercial development opportunities, including potential future platform sales.

Commercial Development and Technology Protection

Li-S Energy stated that Demand for long-endurance uncrewed aircraft continues to increase across commercial and defence markets, with endurance and Supply capability being important considerations for operators.

During the project, Li-S Energy filed two Patent applications relating to developments in battery management systems and battery pack design.

The company continues to focus on developing lithium-sulfur battery technology using proprietary intellectual property and advanced nanomaterials, including boron nitride nanotubes (BNNTs) and Li-Nanomesh™.

Risks and Uncertainty

Battery technology development involves risks associated with technical performance, Manufacturing scalability, commercial adoption, funding requirements and market competition. Successful prototype testing does not guarantee future commercial deployment or sales.

Further development, validation and commercial assessments are required before the technology can be deployed across broader markets.

Key Takeaways

Li-S Energy’s successful Pegasus drone endurance flight demonstrates the application of its lithium-sulfur battery technology in an aviation environment. The flight testing provided performance data for the integrated drone platform and supports further evaluation of commercial opportunities. Future progress will depend on additional development work, validation activities and potential market adoption.

FAQs

Q: What is the EATP Pegasus drone?

A: The EATP Pegasus is a long-endurance drone developed through collaboration between Li-S Energy, V-TOL Aerospace and Halocell Energy.

Q: How long did the Pegasus drone fly during testing?

A: The drone completed an endurance flight of almost two hours using a single Li-S Energy lithium-sulfur battery pack.

Q: What battery technology does Li-S Energy use in Pegasus?

A: The Pegasus uses Li-S Energy’s lithium-sulfur battery system, including 382 Wh battery packs and a battery management system.

Q: What applications is the Pegasus platform designed for?

A: The platform is designed for potential applications including mapping, surveillance, agricultural monitoring, utilities and environmental monitoring.

Q: What are Li-S Energy’s next steps following the flight testing?

A: The collaboration partners plan to analyse flight data and assess further commercial development opportunities for the platform.

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