This second smaller battery will, in many cases, be a familiar sight to most motorists, and is often as you describe – a “wet ...

Even though electric vehicles don’t need a jolt of power to spin a starter motor ... is a DC-to-DC converter, which steps down the voltage and essentially trickle-charges the 12-volt battery ...

Pushing the start button activates a motor controller relay (or ... Instead, the controller also manages a DC-to-DC converter that charges the 12-volt battery using the high-voltage battery.