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Living in SoCal, I don't have cold start issues. But I am aware of how important cranking speed is to getting it started. If my cranking speed begins to fall off because the batteries are low, I know I'm about to get a no-start, and my departure is going to be delayed at least an hour while they charge up. (I have no other vehicle around here with enough ooomph to jump the 7.3).

Is there any merit to considering "battery heaters" for these trucks that cold-soak in winter conditions? Batteries produce about half the energy at 32F as they can at 70F. Keeping the batteries warm would greatly increase their output when it is needed the most.

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