How Many Hours Does a Car Battery Need for Trickle Charging?

[DeCayden]

It is best to charge a car battery for 10-15 hours. Fast charging (constant current charging). Many car owners believe that fast charging can save time, taking only 3-5 hours; however, this is not the case. Fast charging only quickly activates the surface of the battery, while the interior of the battery is not fully charged. Below are some additional notes on car battery charging: 1. The car cannot be completely powered off. Therefore, if using a charger to charge the battery, it should be connected directly to the battery without removing it. Otherwise, data loss may occur, requiring initialization, commonly known as decoding or pairing. 2. If the car battery warning light is on, it needs to be charged promptly. For a running car, charge it at 1500 RPM for over 60 minutes, then at over 1900 RPM for another 60 minutes or more. 3. If the car is not used for a long time, the battery loses about 1% of its charge daily. If the battery remains connected to the car without being removed, the car maintains a minimum current (commonly referred to as 'sleep' current) of about 80mA. If there is an anti-theft alarm, it will consume additional power. Generally, about 2~3% of the battery's charge is consumed daily.