Li-S Energy Limited (ASX: LIS) has signed a non-exclusive collaboration agreement with Australian defence and national-security company EPE Trusted to Protect to evaluate and qualify its ultra-lightweight lithium-sulfur cells for military, security and unmanned-system applications. The agreement gives Li-S Energy a pathway into EPE’s defence customer base and partner network of more than 60 international original-equipment manufacturers and Australian defence primes across Australia, the Indo-Pacific, North America, Europe and the United Kingdom.
Target applications include unmanned aerial vehicles, ground robotics, counter-drone systems, explosive-ordnance-disposal robots and soldier electronics. EPE is an established supplier to defence and security customers and recently received A$3.05 million from Queensland’s Sovereign Industry Development Fund to expand manufacturing of Australian-designed battery-powered drone systems.
The agreement follows Li-S Energy’s August 24 disclosure that it had shipped lithium-sulfur cells to the US Army DEVCOM C5ISR Center for independent evaluation, the company’s first delivery to a United States government agency. The September 2 collaboration therefore broadens the defence-commercialisation path from a single government test toward an ecosystem of systems integrators and platform manufacturers.
LIS closed September 1 at A$0.165, up 3.13% for the session and about 22% above the A$0.135 close recorded on August 21 before the US Army shipment announcement. The September 2 Australian market was still trading when this article was prepared, so A$0.165 is the cleaner unaffected reference rather than an incomplete intraday move.
Why does access to more than 60 defence OEMs matter for Li-S Energy?
Li-S Energy’s commercial challenge is not simply proving that a battery cell can achieve high energy density in a laboratory. Defence platforms require battery technology to be qualified inside specific aircraft, robotic systems, electronics and mission profiles before procurement can begin.
EPE’s partner ecosystem potentially shortens that route by connecting Li-S Energy with platform manufacturers and defence customers that already operate inside established procurement channels. The collaboration allows the companies to identify platforms where lithium-sulfur cells could deliver a meaningful operational advantage, test integration requirements and progress qualification programs.
The opportunity is particularly relevant to unmanned systems because battery weight directly affects range, endurance and payload. Li-S Energy says its cells can deliver more than twice the energy density of conventional lithium-ion batteries, creating the possibility that a drone carries the same battery weight for longer endurance or carries a smaller battery and allocates more mass to sensors, communications equipment or payload.
Those performance claims still require validation in real systems. Qualification can uncover issues around cycle life, temperature, vibration, storage, charging, transport and safety that do not appear in headline energy-density specifications.
The collaboration therefore represents access rather than revenue. Li-S Energy has explicitly said any commercial battery supply resulting from the relationship depends on successful evaluation and qualification and on procurement decisions made by EPE’s customers and partners.
How does the EPE agreement build on Li-S Energy’s US Army milestone?
Li-S Energy shipped cells to the US Army DEVCOM C5ISR Center in August after securing the regulatory and logistics approvals required to send its lithium-sulfur batteries to the United States. That milestone placed the technology directly into a US government testing environment.
The EPE collaboration creates a second route. Instead of relying solely on one government testing pathway, Li-S Energy can potentially work through an established Australian defence integrator with international partners and end users.
That matters because defence adoption rarely occurs through a single customer relationship. Technologies can first be evaluated by a government laboratory, separately integrated into an OEM’s platform and then assessed by a military procurement authority. Success in one channel can support credibility in another without guaranteeing an order.
Li-S Energy has already been building this multi-pathway model. The company has collaborated with MSubs on battery evaluation for unmanned undersea systems used in defence markets, including programs connected with the UK Ministry of Defence, US Navy and US Special Operations Command.
Its current defence strategy therefore spans air, land and undersea applications rather than concentrating exclusively on drones. EPE adds another systems-integration relationship across multiple platform categories.
Why could lithium-sulfur matter more in defence than in mass-market electric vehicles?
Defence platforms often place a higher value on weight reduction than consumer applications. A battery that costs more per kilowatt-hour can still be economically attractive if reducing mass materially increases aircraft endurance, payload, soldier mobility or mission range.
That makes unmanned systems an appealing early market for lithium-sulfur technology. The total battery volumes can be smaller than automotive production, while customers may be willing to pay for performance advantages unavailable from conventional cells.
Li-S Energy’s technology is also manufactured in Australia, which management is positioning as a sovereign-supply advantage for allied defence customers. Governments across AUKUS and allied markets are increasingly focused on reducing dependence on vulnerable supply chains for critical military technologies.
The sovereign-manufacturing argument does not eliminate material-sourcing risks, but it can become commercially important when defence buyers assess supply assurance alongside technical performance.
EPE’s international footprint gives Li-S Energy a route to test whether that combination of performance and allied manufacturing is sufficiently attractive to create procurement demand.
What does Li-S Energy still need to prove commercially?
Li-S Energy remains an early-stage commercialisation company rather than a scaled battery supplier. Its business model envisages selling cells and packs for collaborative testing, supplying larger volumes as programs progress, licensing intellectual property to manufacturers, supplying boron-nitride materials and generating revenue from lithium-metal foil.
That model means today’s collaboration agreements are necessary steps but not the end objective. The financially important milestones are recurring production purchase orders, paid qualification programs, licensing agreements and meaningful utilisation of Li-S Energy’s manufacturing assets.
Investors have already responded positively to the company’s recent defence progress. LIS closed at A$0.135 on August 21, rose 11.1% on August 24 when the US Army shipment was announced and reached A$0.165 by September 1.
At A$0.165, Li-S Energy’s market capitalisation was approximately A$104 million. The valuation therefore already incorporates expectations that its technology can progress beyond development and small-scale testing.
The company also operates in a capital-intensive sector. Cell manufacturing, qualification, product development and scaling production all consume cash before large customer volumes arrive. That creates a different financial profile from software companies, where incremental customers can often be added without equivalent physical-manufacturing investment.
Why is the EPE deal strategically useful even without disclosed revenue?
No financial consideration or minimum purchase commitment has been disclosed for the EPE agreement. That prevents investors from treating the announcement as backlog or contracted revenue.
Its value lies in reducing commercial distance between technology and users. Li-S Energy can access more than 60 OEM relationships through one defence partner rather than attempting to establish every integration relationship independently.
If even a small number of those platform evaluations progress into qualification and production, EPE could become an important channel partner. If none progress beyond testing, the agreement may deliver limited financial benefit despite its broad network.
The next disclosures should therefore be judged by increasing specificity. A named platform entering qualification is more valuable than a generic collaboration; an initial purchase order is more valuable than qualification; and a repeat production order is more meaningful than an initial small batch.
Li-S Energy has now established several early defence pathways, including US Army evaluation, MSubs undersea testing and the EPE relationship. The commercial question is no longer whether the company can find organisations willing to test its technology. It is whether those tests can move into defence procurement at volumes large enough to support manufacturing scale.
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