Before modern battery coils and electronic control units, vintage tractors relied entirely on mechanical magnetos to generate spark. Geared directly to the engine camshaft, these self-contained units produced high-voltage electricity mechanically, requiring no onboard battery. A well-adjusted magneto allowed a tractor to sit unpowered for months and still fire reliably with one good c... https://ulvixo.com/top-5-electric-and-hybrid-tractors-worth-watching-this-year/