How to charge a dead car battery gather the correct materials battery charger battery cleaner disposable rags or paper towels distilled water. Smell the air pay close.

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How to charge a dead car battery. Jump starting the dead battery 1. At least 30 minutes of driving will help charge the battery back to a safe level for your next start. Below 12 volts use a dedicated charger your vehicle s alternator can keep a healthy battery charged but it was never designed to completely recharge a dead car battery if the unit in question reads below 12 volts.

Take note of the positive and negative terminals on each battery. Connect each end of the positive jumper cable to the. Read the instructions that come with.

Open the hood or compartment on each vehicle in which the batteries are located. Take the proper safety precautions an automotive battery can be a very dangerous part to work on. Positive terminals will be indicated by the plus.

Many battery chargers deliver two to six amps some allow you to choose the amperage level and will take at least several hours to recharge a dead car battery.