The facility has produced test battery cells, but none have equipped Chevrolet Volts.

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Over the next several years GE plans to convert half its vehicle fleet to battery power, including 15, 000 Chevy Volts and perhaps 15, 000 electric vehicles from other makers.

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Speaking about the January 7 fire in Boston, Hersman said the plane's flight data recorder showed the battery underwent an unexplained drop in voltage from 32 volts to 28 immediately before the incident, as the plane was being serviced on the tarmac.

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Johnson cut open a 12-volt dry-cell battery and crammed in two more cells in an attempt to get another 4 volts.

FORBES: Royal Boom

The examination of data from the Boston 787 indicated its APU battery did not appear to be overcharged by exceeding its designed voltage of 32 volts, according to Sunday's NTSB statement.

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Users can connect a car charger cradle for their camera battery to the solar output of the Spark, which is switchable between 6 and 12 Volts.

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Severinsky's bright idea was to run the electric motor on a high voltage--say, 40 times the 14 volts that is standard for the electrical system in a gasoline car with a 12-volt battery.

FORBES: OutFront