What to Do When the Car Battery Is Completely Dead?

3 Answers
DeDelaney
07/29/25 9:34am
When the car battery is dead, the only solution is to jump-start it using another battery. Connect the positive terminal of the other car's battery to the positive terminal of your car's battery, and then connect the negative terminal to the negative terminal. Here are the detailed steps: 1. If the battery suddenly dies, contact a rescue vehicle and connect jumper cables to temporarily charge the battery and start the engine. To avoid being unable to charge when the battery is dead, it is advisable to keep a set of jumper cables in the car. 2. When connecting the jumper cables, be very careful not to reverse the order: first connect the positive terminal of the dead battery to the positive terminal of the rescue vehicle's battery, then connect the negative terminal of the rescue vehicle's battery to a metal part in the engine compartment of the dead car (grounding). 3. After connecting the jumper cables, start the rescue vehicle's engine and slightly increase the RPM. After about 5 minutes, the dead battery will receive an emergency charge. Once charging is complete, remove the jumper cables in the reverse order of connection.
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McLily
08/12/25 10:28am
I've also experienced sudden battery failure before. That time in winter, my car couldn't start after being parked roadside for just half an hour. The best solution is to get a jump start from another vehicle. You'll need red jumper cables to connect both cars' positive terminals, then connect the black cable to the donor car's negative terminal first, with the other end attached to the metal frame of the dead car. After starting the donor car, rev the engine a few times before attempting ignition. Once successful, don't turn off the engine - drive directly to a service point. Keep windows open during driving to prevent carbon monoxide poisoning. Develop good habits: always turn off headlights and AC before shutting down, regularly check the battery inspection window color (green means good, black indicates replacement needed). Keeping a portable jump starter in your car is also very helpful.
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LydiaLynn
10/06/25 6:29am
It's really frustrating when your car won't start, but don't panic. First, check if the battery terminals are loose and try tightening them with a wrench. If that doesn't work, call for help – most insurance companies offer free roadside assistance. While waiting, avoid repeatedly turning the key as it could drain the battery completely and even damage the vehicle's computer. If you need a jump start, remember the rhyme 'red to red, black to black,' but always attach the negative cable to a bare metal part of the car body to prevent sparks. After starting, it's best to drive for half an hour to let the alternator recharge the battery. I always keep a repair shop business card in the glove box so I can call them to bring and test a new battery if needed. Pay special attention to battery condition in older cars – if it's over three years old, consider replacing it preemptively.
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