hduff writes "While lithium-ion batteries offer better performance than lead-acid and ni-cad batteries, the supply of lithium is limited and the batteries can pose problems. The Technion-Israel Institute is building a better mousetrap with easily obtainable sand and air." Link to Original Source
The meta-Turing test counts a thing as intelligent if it seeks to
devise and apply Turing tests to objects of its own creation.
-- Lew Mammel, Jr.