Battery-efficient unicycle

Airwheel, a high-tech unicycle, is not only a space saver but also an energy saver

Battery-efficient unicycle
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Segway? So passé! Apparently even the hallowed Harrods agrees that 2015 is high time to hang up the skateboards and scooters in reinventing the wheel — with an Airwheel, a high-tech unicycle controlled by leaning forward or side to side. The device goes 24 miles on a single charge and hits 14mph. It can even run backwards. (from $849 on www.amazon.com, www.theairwheel.com)