Coventry, UK, 2 September 2025: Custom Power, a leader in bespoke battery and power systems, has joined forces with Volklec, the UK’s only independent battery manufacturer, to deliver a sovereign, end-to-end energy solution for the UK defence sector.

This strategic partnership creates a fully integrated capability, from cell development through to battery pack design, manufacture delivery and support, tailored to meet the rigorous demands of defence prime providers. At its core, Custom Power’s bespoke battery and power systems are paired with Volklec’s proven 21700 lithium-ion cell technology to ensure consistent, high-performance energy delivery in the most challenging operational environments.

“Combining Volklec’s proven cell technology with our custom-designed battery systems allows us to meet the exacting standards of defence clients,” said Dave Crossman, Global VP and General Manager at Custom Power.

“This partnership is a powerful example of UK innovation delivering strategic advantage.”

Volklec’s energy cells offer a compelling combination of performance, reliability, and strategic value for defence applications. With balanced energy and power density, the cylindrical 21700 format delivers mechanical robustness and proven thermal management which is ideal for demanding operational environments.

“Built for mission success, this alliance is about more than technology – it’s about trust, resilience, and readiness,” said Phil Popham, Executive Director at Volklec.

“Our cells are engineered for flexibility and can be configured into diverse pack formats, supporting a wide range of platforms from portable handheld communications devices to autonomous vehicles and robotics. Together with Custom Power, we’re enabling defence organisations to operate with confidence, mission after mission.”

Designed and manufactured in the UK, they reinforce sovereign supply chain resilience and align with the Ministry of Defence’s priorities for domestic capability. Custom Power and Volklec’s commitment to increasing local content also supports the UK Government’s real, evolving, and multi-faceted movement within UK defence policy for Net Zero.

Engineered for reliability, the energy cells operate across a wide temperature range, while their low internal resistance improves thermal control and reduces cooling costs, ensuring consistent performance regardless of the mission.

The collaboration between Custom Power and Volklec was facilitated through MAKE UK Defence, a national initiative that strengthens connectivity and capability across the UK’s defence supply chain. By advancing domestic energy technology and reducing reliance on international suppliers, the partnership reinforces the UK’s industrial resilience and supports the development of sovereign supply chains.

“We’re proud to have played a role in bringing Custom Power and Volklec together,” said James Watson, UK Membership Growth Director at MAKE UK Defence.

“This collaboration exemplifies the kind of high-impact partnerships that strengthen our national capability and support the future of UK defence.”