Greg Smith, Engineering Group Manager, Electrification, left, Tim Grewe, General Director, Electrification, center, and Stephen Poulos, Global Chief Engineer, Electrification, right, pose with a Chevrolet Bolt EV battery pack and drive unit in General Motors Global Battery Systems Laboratory at the GM Technical Center in Warren, Michigan, Tuesday, April 5, 2016. (Photo by Jeffrey Sauger for Genera

Photo by: Mark Kane
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