Lotus will use batteries supplied by Britishvolt for a new electric sports car, which it has previewed in a design sketch.
The two firms have signed a memorandum of understanding to "collaborate on the research and development of advanced EV technology".
The main focus of the programme will be developing batteries for Lotus's upcoming family of electric sports cars – the first of which, likely to be the car previewed below, is the two-seat Type 135, due in 2026.
The new sketch suggests the model will take design influence from historic Lotus sports cars including the Esprit and Europa, with a low-slung, cab-forward silhouette, prominent front wings and pronounced rear haunches.
The new follows last week's announcement that Britishvolt had secured £1.7 billion in investment from new backers Tritax and Abrdn to fund the production of its battery factory in Blyth, Northumberland, which is set to be operational in 2024.
An earlier investment from the government's Automotive Transformation Fund is understood to have contributed another £100 million to the scheme.
Lotus is the first company to be named as a Britishvolt customer, and the battery maker has promised to name more in "a series of announcements" over the coming weeks.
It has previously referred to "relationships with blue-chip automotive sports car brands" but has given no further details.
Priorities for the Lotus sports EV in particular will be fast-charging capability, optimising energy density and keeping weight down – the latter of which will remain a hallmark of Lotus sports cars into the electric era.
Lotus recently confirmed that its new E-Sports platform for electric sports cars can accommodate batteries arranged conventionally under the floor or stacked up behind the seats to mimic a mid-engined layout.