What to Do When the Car Battery Is Dead?
2 Answers
Use jumper cables to start the car's battery, then let the engine idle for a while, and the car's alternator will naturally recharge the battery. Fully charge the battery, then discharge it, and recharge it again to restore the battery to its original state. Use a positive-negative pulse method to depolarize the battery during charging, then fully discharge it. Once fully recharged, the battery will return to normal. Open the top cover of the battery to find six small holes. Add battery replenishment fluid into these holes until it reaches the marked line, then let it sit for four to five hours.
That time my car broke down on the roadside, I thought it was a dead battery and quickly checked the causes. Common issues include leaving headlights on, long-term parking, or battery aging. I used jumper cables to ask a neighbor for help: turn off both cars, connect the red cable to the positive terminals of both cars, the black cable to the ground or negative of the dead battery car, then start the assisting car, wait a few minutes before trying to start mine. If successful, drive around for half an hour to let the alternator charge. If the battery keeps dying, it's time for a replacement, usually after 3-5 years of service. To prevent this, I've developed a habit of checking all devices are off after parking, taking a weekly drive to let the alternator work, and avoiding prolonged discharge in cold temperatures. Keeping an emergency jump starter in the car is also very practical.
