The non-hybrid propower (2kW) is two 12V batteries in series, and a dedicated alternator. And it is electrically isolated from the rest of the truck for safety. I have not seen pictures of the 2 batteries to know what kind they are. But the main battery under the hood is a special one for high cranking amps and capable of many cycles of auto start-stop, and it has no backup that I'm aware of (even in hybrids).So does the pro power on board battery on a V8 dub has a backup battery when the regular battery goes belly up? Or does it act as a central battery for all functions? So confused. I ordered my V8 with the Pro-Power on board and don't know what to expect.