How to Fix a Car Battery That Won't Charge?

2 Answers
MacSarah
09/04/25 7:56am
Car battery charging failure repair methods are: 1. Loose charging circuit connection, need to securely reconnect the charging circuit; 2. Damaged charger, requires replacement with a new charger. The functions of a car battery are: 1. To supply power to the starting system, ignition system, and electronic fuel injection system when starting the engine; 2. To power the vehicle's electrical equipment when the engine is off or at low idle. Precautions for using car batteries: 1. Regularly check the electrolyte level and replenish immediately if below the minimum mark; 2. Keep batteries away from open flames; 3. When charging the battery, carefully read the warning labels; 4. Battery electrolyte is corrosive - avoid direct contact with eyes and skin; 5. Perform regular battery maintenance.
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McZachary
09/17/25 2:00am
I just encountered a situation where the battery won't charge. First, check if the battery terminals are loose or corroded. You can tighten them with a screwdriver and clean the terminals, using vinegar or baking soda solution if necessary. Then, test whether the charger is functioning properly by trying another charger. If the voltage reading is low, it might be deeply discharged, and setting it to slow charge mode for over 24 hours may help recover it. If none of these work, the battery is likely aged and needs replacement. To extend battery life, minimize electrical usage after turning off the engine when parked. Remember to wear gloves and goggles when handling the battery to avoid acid burns. Doing these basic checks at home saves both time and money.
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