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this post was submitted on 10 Sep 2023
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https://greenbeanbattery.com/hybrid-vehicles-two-batteries/?gclid=EAIaIQobChMIkfjUrc2fgQMVYTbUAR1LIisoEAAYASAAEgJdk_D_BwE
Huh.
I knew about the rest of the things it does because I can run my stereo and my headlights on my Prius without the battery indicator dropping. But I totally thought it also started the car.
Well in a technical sense you are also right, since the contactor for the main battery gets power from the 12v (albeit it's not a big load) Meaning if the 12v is completely dead the hv battery will not switch on and the motor will not start.