Tons on IOT devices? Could you mention a few (that are actually useful)? The only one I know is the cellphone.
And even if they were powered from mains I don't want it to be inefficient. If they don't come with a buck converter with low quiescent current please don't buy it.
And even if they were powered from mains I don't want it to be inefficient. If they don't come with a buck converter with low quiescent current please don't buy it.