Pedalling with a battery on one's back
How easy, common and safe is it to pedal with a battery in one's backpack as in this clip?
http://www.youtube.com/watch?v=RK38Nw_KNmY
How easy, common and safe is it to pedal with a battery in one's backpack as in this clip?
http://www.youtube.com/watch?v=RK38Nw_KNmY
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