What Gear Should Be Selected for Charging Current of a 12V Car Battery?

[NoahLynn]

For a 12V car battery, select gear 1 or 2 for charging current. Additional information: 1. Select based on battery capacity: The charging current is not determined by the battery voltage but by its capacity. The optimal current is 1/10 of the capacity. For example, a 10Ah battery is best charged with a 1A current. Using a higher charging current can reduce charging time but may damage the battery's lifespan. The current should preferably not exceed 1/3 of the capacity. 2. Flexible charging methods: For example, when charging a 12V 60Ah battery, use a constant voltage with current limiting method. Charge at a constant voltage of 14.8V with a current limit of 15A for 16 hours, followed by a constant current of 3A for 4 hours, totaling 20 hours. Also, consider whether time permits. Using a higher current reduces charging time but can harm the battery, so use it cautiously.