The auto industry's rollout of new 42-volt electrical systems is going to be stereotypically slow and staggered across model lines. Forecasts indicate single battery, 42-volt architectures won't be in production in all vehicles until 2020 or so. Most automakers are opting for a costly transition period when cars and trucks will have two batteries, the current 14-volt system and the 42-volt assemblage, because some components presently can't handle the increased juice. A switch straight ...

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