20-year-old MIT student Charles Guan normally spends his off time constructing competition-level battle robots. But when he got the urge to try something a bit different, Guan unleashed the true untapped potential of the shopping cart. Brace yourself for the LolrioKart.
Cobbled together from some leftover lithium nanophosphate cells from A123 that the company had donated to the University, the 33 Ah battery pack sends its 48 volts to a Briggs and Stratton ETEK DC pancake electric motor, which operates through a DIY rear differential and to the tiny little tires out back. The result is equal parts hilarious and awesome.