It should come as no shock that the dated 12-V auto electrical systems are no longer viable in new vehicles, especially hybrid electrical vehicles (HEVs) and the new all-electric vehicles (EVs). The replacement systems use either 48-V batteries for HEVs or 400+-V batteries for EVs. These power-hungry systems rely on the higher voltages as well as switch-mode techniques that give them the efficiency necessary to make them practical.
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