Retro Thing posts about the 1968 AMC Amitron concept car:
A dual-battery arrangement, with nickel-cadmium and lithium-nickel-fluoride batteries, made possible a claimed range of 150 miles (241 km) per charge, with a top speed of 50 mph (80 kph). This with a total battery weight of only 200 pounds (91 kg) which is pretty light for an electric car. Regenerative braking was also part of the deal... The car, small as it was, could seat three across - and if you didn't need all three seats, you could deflate 'em to provide some luggage space!