Lotus provided the gearbox and a rear axle based on a design for car steering columns.[28] The C5's electronics were produced by MetaLab, a Sinclair spin-off.[4] The wheels were assembled from tyres made in Taiwan and wheels from Italy.[5] Oldham Batteries provided a lead–acid battery developed for Sinclair that could manage more than the 300 charge-discharge cycles that had originally been specified.[28]