Battery charging may soon be another service offered by supermarkets, if the electric car market develops as expected. The Department of Energy estimates that nearly 56,000 electric cars are currently operating in the United States (not including gas-electric hybrids), with an average growth rate of around 27%. As more of them hit the road, they're going to need somewhere to top off their power supply. “I think there's a tremendous opportunity for supermarkets here,” said Colin Read, vice ...

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