Gaussion is four years old, holds 66 patent applications across 17 families, and has just closed a €24.5 million round, about $28 million, that brings its total funding past $44 million. The detail that says the most about how the market reads the company is on the cap table: two of Tesla’s earliest backers are now on it. Future Ventures, run by Steve Jurvetson, an early investor in SpaceX and Tesla, led part of the round, and joins board member Simon Rothman, another early Tesla investor, in betting on a London battery lab.

The round was co-led by BGF and AlbionVC, with Autotech Ventures, the UCL Technology Fund and DN Capital following on. BGF was investing for the third time, which is its own kind of signal: a growth investor doubling down twice on a company that has yet to put its product into mass deployment. Gaussion is a 2022 spinout from University College London and the Faraday Institution, Britain’s battery-research hub, and it has spent the time since arguing that the most valuable thing you can do to a battery is not change it.

The trick is to leave the battery alone

Almost everyone else in the battery business is working on the cell. New chemistries, solid-state electrolytes, silicon anodes, sodium-ion, the entire field is a race to build a fundamentally better unit of storage. Gaussion is doing something narrower and, on its own terms, cleverer. It applies an external magnetic field to a standard lithium-ion battery and uses that field, governed by a control chip and software it calls Aeon, to move ions through the cell faster and more evenly. The effect, the company says, is quicker charging and a longer usable life, with no change to the battery’s chemistry or design.

That last phrase is the commercial argument. A new chemistry has to win on cost, safety and manufacturability against an incumbent that has had decades and trillions of charge cycles to get cheap and reliable. A system that bolts onto existing cells, branded MagLiB as a magnetic printed-circuit retrofit, sidesteps that fight entirely. It rides the lithium-ion industry instead of trying to unseat it. The same hardware, in principle, works wherever a lithium-ion battery does: charging an electric car or a drone in minutes, holding a grid steady, or absorbing the sudden power spikes that the computers behind AI throw at a data centre.

Tom Heenan, Gaussion’s chief executive and co-founder, puts the stakes in deliberately broad terms. “The race everyone’s watching is about computer chips, but the real prize is the battery,” he said. “The battery decides whether the giant computers behind AI can keep running. Whether a drone can stay in the sky. Whether a satellite survives out in space. Every battery faces a physics ceiling, and we move that ceiling.” It is a founder’s line, sweeping by design, and the honest gloss is that Gaussion does not move the physics of the cell so much as get more out of it before the ceiling bites. Whether that margin is worth retrofitting hardware for is the question the next few years answer.

A retrofit is only as good as who installs it

The structure that makes Gaussion clever also defines its risk. A technology that enhances someone else’s battery has to be designed in by the people who build the batteries and the things they go into, which means the company’s fortunes run through the procurement decisions of carmakers, aerospace firms, energy-storage builders and consumer-electronics manufacturers. Gaussion says it is working with several of the largest names in each of those sectors and that its technology is being evaluated across 14 active commercial programmes. Evaluations are not deployments. The gap between a promising lab result inside a manufacturer’s test bench and a line item in a shipping product is where hardware companies go to wait.

There is reason to think Gaussion can cross it. The company moved into a 40,000 square foot facility in central London in late 2025, one of the larger battery research sites in Europe, and the British Department for Business and Trade picked it as one of a small set of companies for its largest-ever trade mission to the United States. Its patent base traces back to genuine Faraday Institution research rather than a deck. And the involvement of investors who backed Tesla before it was Tesla suggests people who have done this before see something structural here, not just a neat demo.

Set against the wider European picture, the bet has a logic the continent keeps returning to. Europe is trying to build energy resilience, an electrified transport base, and the dual-use systems, drones, satellites, the power behind compute, that increasingly decide both economic and strategic standing. A British company holding the intellectual property for getting more out of every cell in that stack, and keeping it onshore, is the kind of capability worth owning rather than importing.

For now Gaussion has $44 million, a third vote of confidence from BGF, and a building full of magnets and lithium. The technology either earns its place inside other people’s products or it does not. Quietly, that is the only test that matters.