Brisbane – November 10, 2026 -- Li-S Energy Limited (ASX: LIS) has finalised two high-power lithium-sulfur cell designs that deliver up to 50 times the power of traditional lithium-sulfur chemistry while keeping energy density close to 400 Wh/kg. The company has completed datasheets for both cells and shared them with partners under NDA.
Power cells target the multi-rotor drone segment
High power delivery has long limited lithium-sulfur chemistry to a narrow set of applications. Traditional cells typically discharge continuously at only 0.1C to 0.2C. Li-S Energy's 11Ah cell runs at 7C continuous, and the company is aiming the new range at multi-rotor drones, soldier-carried systems, robotics and communications.
The new cells deliver a continuous power density of 1,700 W/kg and a peak of 2,400 W/kg. Li-S Energy says this brings the technology into the fast multi-rotor UAV market.
Two variants split cycle life against discharge rate
The 10Ah cell is rated at 2C continuous and 5C peak, yielding 100% of stored energy. It is built for systems that need longer cycle life.
The 11Ah cell is rated at 7C continuous and 10C peak, yielding 96% of stored energy. It is designed for single-use and low-cycle-life applications where power outweighs durability.
Energy density stays close to 400 Wh/kg
The company says the cells retain almost the entire weight advantage of its broader technology. Its GEN3 cell reached 456 Wh/kg after formation cycling in 2024, around twice the energy density of lithium-ion. GEN3 targets low-power, long-endurance platforms such as fixed-wing drones and marine systems, and the Power Cell range now covers applications that need much higher power.
Chief Technology Officer Dr Steve Rowlands said the 11Ah cell delivers over 95% of its energy in under nine minutes, calling it "world-beating performance" for commercial-sized lithium-sulfur cells.
Automated Phase 3 line produced both variants
Both variants were produced on the company's automated Phase 3 production line. Li-S Energy announced its intention to tackle the power limitation twelve months ago, and says it has since developed, tested and characterised the new cells. CEO Dr Lee Finniear said the cells open up a "massive market sector" for the company.
Rowlands said the cells' consistency and commercial size allow the company to match them and integrate them into battery packs for drone applications.
Roadmap targets higher energy density at high power
Li-S Energy plans to keep raising energy density while maintaining high power performance. The aim is to extend system range, operating time and payload. The company will update the market as the programs progress under its continuous disclosure obligations.