SES Holdings, a startup backed by General Motors (GM), is unveiling a lithium-metal battery big enough to power a car, a sign the newcomer is pulling ahead of rivals in its efforts to commercialize technology that could boost the range of electric vehicles. Singapore-based SES, which is going public through a $3.6-billion reverse merger with a shell company led by billionaire mining investor Robert Friedland, on Wednesday is showcasing a lithium-metal battery cell with more than 100 amp hours, or units of charge. The average capacity of a lithium-ion battery cell in EVs today ranges from 50 to 120 amp hours.
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