How Long to Charge a Dead Battery at Idle Speed?

[StKarter]

When a car is idling, the generator runs at a low speed, resulting in a small charging current. It may take more than 6 hours of high-speed driving to fully charge the battery. Here is more information about idling in place: 1. Reason: Prolonged idling in place can affect the car's engine, leading to increased carbon deposits inside the engine. 2. Correct Practice: After starting the engine, you can drive in gear for a while, which is beneficial for the car's engine, transmission, battery, and tires. 3. Proper Warm-Up Method: Drive at low speed. After idling in place for half a minute to 1 minute, when the engine speed stabilizes, you can shift into gear and drive, keeping the speed below 2000 RPM, shifting gears gently and accelerating steadily. This is the most standard and correct warm-up method, which is energy-saving, environmentally friendly, and reduces carbon deposits.