Marcus Reed covers the gear that sits next to a scan tool: battery testers, jump starters, chargers, TPMS tools, multimeters, inspection cameras, and smoke machines. He builds his roundups from manufacturer ratings and safety specs, published independent test results, and long-term owner feedback, all compared side by side so you can see which claims hold up. Marcus focuses on practical fit, like the right peak amps for your engine or the right tester for your battery type. He favors gear that rounds out a DIY diagnostic kit without wasting money.
Marcus Reed, Garage Gear Researcher at BestOBD2Picks Garage Gear Researcher
