How to Charge a Car Battery in the Rain

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Let's say you are driving home from a party or a sporting event. It's pouring rain and, as you drive home, your car battery dies. While you'd probably be better off waiting for the rain to stop, if you are in a bind you can, technically, charge your battery in the rain.

How to Charge a Car Battery in the Rain
(Lawrence Roberts/Demand Media)

Things You'll Need

  • Jumper cables
  • Personal battery charger or another car battery
  • Tarp or some other kind of covering
Step 1

Pull both vehicles to the side of the road, facing each other. If the cars are lined up nose-to-rear, the jumper cables won't reach both batteries (unless one of the vehicles has a rear-mounted engine).

Lawrence Roberts/Demand Media
Step 2

Ensure that the electrical systems of both cars are turned off before opening the hoods.

Lawrence Roberts/Demand Media
Step 3

Drape a tarp or another kind of water-resistant material over the open hoods. This keeps water away from the battery and, in turn, protects you from conducting electricity.

Lawrence Roberts/Demand Media
Step 4

Connect the red (positive) cables to the corresponding positive terminals on each of the batteries. Do the same with the black (negative) cables.

Lawrence Roberts/Demand Media
Step 5

Wait a few minutes for the battery to charge sufficiently.

Lawrence Roberts/Demand Media
Step 6

Attempt to start the engine. If the car doesn't start, wait an additional 10 minutes to allow more of a charge, then try again. If it continues to not start, your car battery may simply be dead.

Lawrence Roberts/Demand Media
Step 1

Pull your car to the side of the road.

Lawrence Roberts/Demand Media
Step 2

Shut the engine off and make sure that all electronics are turned off. This includes the light that turns on when your car door opens.

Lawrence Roberts/Demand Media
Step 3

Open the hood and drape a tarp or another water-resistant material on the hood to shield the car engine from rain.

Lawrence Roberts/Demand Media
Step 4

Connect the red (positive) clamp to the positive terminal on the car battery. Do the same for the black (negative) clamp.

Lawrence Roberts/Demand Media
Step 5

Flip the switch on your car battery charger and allow the device up to 20 minutes to charge the battery. Depending on the type of charger you have, you might have to turn a crank to build up the battery charge before transfer.

Lawrence Roberts/Demand Media
Step 6

Turn the key and start your engine. If it does not start, wait another five to 10 minutes. If it does start, exit the vehicle and disconnect the charger.

Lawrence Roberts/Demand Media

Tips & Warnings

  • If you have a manual transmission, try to jump-start your car. You need to gain sufficient speed by having someone push you or by rolling down a hill. Depress the clutch and put the car in second gear. When you reach about 10 mph, disengage the clutch. Often, the car will start.

References

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