How Many Hours Does It Take to Charge a Dead Car Battery?

[AlexaDella]

When a car battery is dead, it generally takes about 4 hours to fully charge with fast charging. Here is some related information about charging a car battery: 1. Other Charging Methods: Another method is slow charging, which takes 10-15 hours. Deeply discharged batteries must be charged slowly; otherwise, insufficient charging time and charge will directly affect the car's driving performance. 2. Precautions: (1) Clean the battery exterior with a damp cloth, wiping away dust, grease, white powder, and other contaminants that may cause leakage from the panel and terminals (positive and negative poles). Regular cleaning prevents the accumulation of white acidic corrosion powder on the terminals, extending the battery's lifespan. (2) Check if the battery is charging normally. If you have a multimeter, measure the voltage across the battery terminals after starting the engine. It should exceed 13V to be considered normal. If the charging voltage is too low, consult a professional to inspect the charging system.