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An electric bicycle—it's a regular bicycle, but with a motor on it ! There are enough moving pieces on these personal mobility vehicles to make buying one confusing . Even if you're pretty sure you know what an electric bicycle is —and that you're not, riding, say, an electric motorcycle from a dealership —the technology changes almost daily.

Over the past 10 years, battery capacity has increased by around 50 percent, according to Joe Buckley, the e-mountain bike product manager at Specialized . In addition to monster battery power, motors are also getting beefier. “Motor power is a big

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