How many hours does it take to charge a car battery that has run out of power?
1 Answers
Typically, the battery capacity of a household car is around 60Ah, and the required charging current is one-tenth of the battery capacity, which is 6A. Charging at this current usually takes about 3-5 hours to fully charge the battery. If a lower current is used, it may take around 10 hours to fully charge. You can determine if the battery is fully charged by observing the following signs or checking the battery's indicator eye, which turns green when fully charged: (1) A large number of bubbles are produced inside the battery, creating a 'boiling' phenomenon. (2) The terminal voltage rises to its maximum and does not increase further within two hours. (3) The electrolyte level rises to its highest point and does not increase further within two hours.