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Discussion Starter · #1 ·
Another discussion about batteries prompted this thread. I had stated that I thought that the 12V battery started the engine and was told

Not with a hybrid it does NOT.
So what does the 12V battery do? Why bother with one at all? Why not just pull 12V off the big battery pack?

If the lithium battery gets run down, how do you get the engine started?
 

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'17 C 4
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So what does the 12V battery do? Why bother with one at all? Why not just pull 12V off the big battery pack?

It boots up all the computer boards and runs some accessories......like blower fan motor and electric windows.

If the lithium battery gets run down, how do you get the engine started?

If the HV hybrid battery is dead........you can't start the car.
Jumping a ~230 V battery is NOT an option.
Most of them aren't lithium.
 
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