A unique feature of electric cars back in the day were volt-amp meters. This meter would have been attached to a car's lead-acid battery and monitored by the driver, according to Electric Auto Association historian Darryl McMahon. These days electric car owners get great detail on battery charge state and projected range remaining. But early 20th century electric cars required a bit more skill by reading both the electric load, reflected in the voltage meter, and how hard the electric motor was working, reflected on the ammeter. Electric cars were typically driven by a hand-operated control, rather than pressing a pedal.
February 6, 2012 4:00 AM PST
Photo by: Electronic Auto Association/Ecologics
| Caption by: Martin LaMonica
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