"The Little Box Challenge" is a competition launched by Google & IEEE in 2014. This offers a million dollars to anyone who invents the smallest 'little box', which, if it comes through will significantly affect the economics of such things as electric cars and household equipment.
'Little box' refers to miniaturizing what kind of electrical equipment?
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An inverter (to convert DC to AC).
More here.
This day last year: Q.1040