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

Photo by: Mark Kane
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