How to Start a Cold Car Battery Without Jumper Cables

Severe winter weather certainly isn't easy on cars, particularly car batteries. In many of the coldest parts of North America, drivers keep their batteries warmed by using special heating units that plug into their garage outlets. But harsh temperatures still affect drivers who don't have these clever gadgets, and they can end road trips before they even begin. If your battery won't pump any juice because of frigid temperatures, you can always give this method a try.

Instructions

    • 1

      Pop the hood on the car with the dead battery.

    • 2

      Remove the battery cables from the battery and carefully lift the battery straight up and out from under the hood.

    • 3

      Take the battery indoors into a warm environment. Leave the battery in one of the warmest areas, such as near a radiator or HVAC vent.

    • 4

      Allow the battery to gradually warm up for at least 1 hour.

    • 5

      Take the battery back outside and slide it back into place under the hood.

    • 6

      Reattach the battery cables to the battery and close the hood.

    • 7

      Attempt to start the car.

Tips & Warnings

  • This method does not always give batteries the warmth they need to start your car, but they often warm them up enough to make them receptive to a jump. So even if your car doesn't start up immediately, there's still a good window of opportunity for you to try to get a jump from a working battery while the dead one is still warm.
  • This will not bring a completely dead battery back to life; it only works on good batteries that have become too cold. Never attempt to heat up a battery by placing it in a microwave, in warm water or touching a heated element. Use common sense, and recognize that car batteries need to be warmed gently and slowly.
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