This UK Battery Startup Just Landed a Massive Strategic Investment

Jan de Vries · 2026-08-14

When you think about the backbone of modern defense, you might picture warships or fighter jets. But the real game-changer these days is the battery. That's exactly why SubSea Craft, a Portsmouth-based maritime tech company, just made a major move by investing millions into LORILLION, a specialist battery developer based in Coventry. This isn't just another funding round; it's a strategic play to secure the UK's sovereign capability in designing and manufacturing advanced battery systems for defense, marine, and automotive use. The deal gives SubSea Craft a 40% equity stake in LORILLION, a company that's been quietly building a reputation for rapid development of bespoke electrification solutions. The investment is a strong signal that the UK wants to keep critical battery technology close to home, rather than relying on overseas suppliers. For anyone watching the defense tech space, this is a big deal. ### Why This Investment Matters for UK Defense Modern military operations depend on reliable, high-performance power sources. SubSea Craft's CEO, Camilla Martin, put it perfectly: "Modern defence capability is only as resilient as the industrial base behind it." She emphasized that this investment is about more than just securing batteries; it's about securing the engineering knowledge and manufacturing capability needed to sustain strategically important British technology. The partnership is already bearing fruit. LORILLION is now developing a bespoke pressure-tolerant battery system for SubSea Craft's VICTA vessel, a dual-domain maritime platform that can transition from high-speed surface transit to a covert subsurface mode. These batteries need to operate at depths exceeding 164 feet (50 meters), which requires serious engineering expertise.  ### What LORILLION Brings to the Table Founded in 2023, LORILLION isn't your average battery company. It specializes in the rapid development of bespoke battery systems for demanding, highly regulated applications. The company offers turnkey services that cover everything from initial concept development and product design to validation, certification, and production. That's a complete package, which is rare in this industry. Richie Frost, CEO of LORILLION, sees this as a major accelerator. "Our strategic partnership with SubSea Craft will accelerate the development of key battery technologies and a dedicated battery-pack manufacturing capability," he said. The investment allows them to expand their engineering team to over 70 people and speed up the development of their proprietary battery-management technology. They're also planning a new production facility in the Midlands, which is expected to open next year. ### The VICTA Platform: A Glimpse Into the Future SubSea Craft, founded in 2014, has a clear mission: to provide maritime and amphibious forces with an operational advantage through accelerated research and development. Their VICTA Class craft is the first in a series of multi-domain platforms designed for covert operations. The ability to deliver operators and equipment discreetly is a huge strategic advantage. What sets SubSea Craft apart is their approach. They fuse continuous end-user engagement with rapid prototyping and open-architecture, software-centric design. Everything is done in-house, from concept exploration to manufacturing and through-life sustainment. This vertical integration ensures they can field solutions quickly and keep them reliable over time. ### A Strategic Win for the UK's Industrial Base This investment is a clear win for the UK's industrial base. It strengthens the country's ability to design, industrialize, and manufacture specialist battery systems domestically. For LORILLION, it's a chance to scale up and play a critical role in national security. For SubSea Craft, it's about maintaining control over a mission-critical component and building a resilient supply chain. Martin summed it up well: "For VICTA, the battery is not a commodity component. It is a mission-critical system." Having a UK design and manufacturing partner working directly alongside their engineering teams allows them to accelerate development and maintain control of performance. This partnership is a textbook example of how strategic investments can build long-term resilience in the defense sector.