Team members raise a Chevrolet Volt electric vehicle on a hoist after releasing the battery from the underside at a design studio in Troy, Michigan January 18, 2012. The Chevrolet Volt stands as the most heavily promoted - and harshly scrutinized - vehicle from General Motors Co in decades. And that's just version 1.0. Amid the debate, one aspect of the Volt has escaped the notice of fans and critics alike: the roadmap for potential upgrades GM left buried deep inside. A bolt-by-bolt, surgical deconstruction of the Volt attended by Reuters without the involvement of GM showed how the plug-in hybrid was designed for relatively quick upgrades such as a longer driving range under electric power. Picture taken January 18, 2012. To match Feature GM-VOLT/ REUTERS/Rebecca Cook (UNITED STATES - Tags: TRANSPORT BUSINESS ENERGY ENVIRONMENT)