What current should be used to charge a dead car battery?
1 Answers
When charging a dead car battery, use a current equal to one-tenth of the battery's capacity. Typically, the battery capacity of a household car is around 60Ah, so a 6A current is suitable for charging, which takes about 3 to 5 hours to fully charge. If using a lower current, it may take around 10 hours to fully charge. Precautions for charging a car battery include: 1. The car should not be completely powered off. Therefore, if using a charger, connect it directly to the battery without removing it, as this could lead to data loss requiring initialization, commonly known as decoding or code matching; 2. If the battery voltage is 10% lower than the rated voltage, there is a risk of battery depletion. It is recommended to fully charge the battery once a month.