How long does it take to charge a car battery to normal?
1 Answers
Generally, it takes about two hours to charge a car battery to normal. Here are the extended details: 1. Conditions for fully charging a car battery: The total charging time is approximately 45-65 hours. When the temperature is controlled between 35-40 degrees Celsius, the first charge is completed. If the specific gravity of the electrolyte does not meet the requirements, adjust it using distilled water or 1.4 specific gravity electrolyte, then charge for another 2 hours until the specific gravity meets the standard. 2. First charge for a new battery: A new battery often doesn't reach its full capacity after the first charge. A discharge cycle should be performed, discharging at a 20-hour rate (i.e., discharging at 1/20 of the rated capacity current until the single-cell voltage drops to 1.75V), then recharging until fully charged. If the capacity is still below 90% of the rated capacity after one charge-discharge cycle, another charge-discharge cycle should be performed.