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Extreme cold puts a greater strain on the battery especially when the engine is cold. The oil in the engine is cold and does not flow as well as it does when it is warm. This requires more torque to turn the engine over and that puts a strain on any battery that is not in tip top shape. You either have a battery that is weak and needs replacing or the battery has too little CCA for the engine. Get the highest Cold Cranking Amps (CCA) rated battery you can get that will fit your car. The more CCA the easier it will be for the battery to start the engine when it is cold.

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Q: Why would a car battery fail in very cold wearther?
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