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AEKDBull t1_j6lk3lz wrote

Reply to comment by HostelofMaine in I get to experience -30 degrees for the first time this coming Saturday. Do I need to be concerned with my well freezing? It’s a standard drilled well with casing and cap. Any advise from my northern friends? Thanks! by MicasNoggin

At Zero degrees, a battery has about 70% of its starting power

At -30 degrees, a battery has about 20% of its starting power

Also, the amount of power needed to crank an engine increases as the temperature drops. Will just leaving your car in the cold have little to no impact, yeah probably, but if you need it it's best to have been prepared by having the engine and battery warmed up.

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