Resonant Link, a developer of a wireless charging technology for medical devices and electric automotive fleets, has raised a $9.3 million seed round, led by The Engine, the venture firm spun out of MIT that invests in early-stage Tough Tech companies.

New investor Volta Energy Technologies also participated in the round, alongside previous pre-seed investors including: Emerson Collective, Scout Ventures, Urban Us, and FreshTracks Capital.