How long does it take to fully charge the car battery after starting the engine?
1 Answers
The car engine needs to maintain a speed of over 2000 RPM, and it generally takes at least 4 hours of driving to fully charge the battery. The alternator in the car requires a speed of over 2000 RPM to operate at full capacity, at which point the power generation reaches the nominal value indicated on the nameplate. If the engine speed does not reach 2000 RPM, the charging time will be even longer. Here are some methods to determine if the battery is fully charged, such as observing the indicator eye turning green: 1. A large number of bubbles appear in the battery, indicating a "boiling" phenomenon. 2. The terminal voltage rises to the maximum value and does not increase further for two hours. 3. The electrolyte level rises to the highest position and does not increase further for two hours.