48-volt electric turbochargers and motor generators can yield big savings. A $2,000 investment might increase fuel economy 20 percent. By Bill Howard April 26, 2017 ...

12-Volt Batteries in EVs, PHEVs, and HEVs. Hybrids typically draw on their high-voltage batteries to start and restart their engines and EVs never start an engine, so the cold-cranking amp ...