Dul Battery System

A duel battery system first showed up around odisplacement engines. They can, if you're not getting any power in, you can flatten a battery depending on the size of it. So that's the reason why many desol vehicles, and particularly ones with larger displacement engines, will have duel battery systems. And there are some great options kind of in the middle too. Like national luna has this. It's like a portable une power pack, they call it, or something.