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Wildcat Discovery Technologies , a San Diego-based startup, thinks it has made a discovery that could, in one fell swoop, make your laptop battery, cell phone battery, and electric vehicle batteries all last between 25% and 65% longer. The key: a pair of new materials---a high-voltage electrolyte material and a high voltage cathode material--that provide vastly improved energy density compared to today's technologies (in technical terms, they have an energy density of over 675 Wh/kg while operating in fuel cells at five volts).