5.Voxan Wattman 
Upon its release in 2013, the Voxan Wattman was known as the world's most powerful electric motorcycle, thanks to its 12.8kWh battery pack. The all-electric motorcycle can go from zero to 60 mph in a mere 3.4 seconds for a quick, emissions-free getaway. Perhaps one of its best features, though, is that the battery can be fully charged in about half an hour - and that gives the bike a range of around 111 miles. Launched as a concept bike, the Voxan Wattman was primed to take on the motorcycle market, but the company dropped the project after it was plagued by a host of complications.

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