Can purified water be added to a car battery?

[LaIsaac]

Whether purified water can be added to a car battery depends on different situations: 1. It can be added to water-based batteries; 2. It cannot be added to maintenance-free batteries. The maintenance methods for car batteries are: 1. Do not overuse the battery; 2. Regularly clean the positive and negative terminals of the battery; 3. Periodically check the vent holes on the cover of non-maintenance-free batteries to avoid blockages; 4. Avoid excessively low water levels in the battery; 5. When parking for an extended period, start the vehicle once a week to charge the battery. The functions of a car battery are: 1. To supply power to the engine starting system, ignition system, and the vehicle; 2. To power the vehicle's electrical equipment when the engine is off or idling at low speed; 3. To mitigate impact voltage in the electrical system and protect the vehicle's electronic equipment.