How often should a battery that is not used for a long time be charged?

[VonAndrew]

Electric vehicles that are not used for a long time should have their batteries charged once a month. Prolonged inactivity of an electric vehicle may lead to battery discharge. When a battery is discharged, sulfation is likely to occur, where lead sulfate crystals adhere to the electrode plates, blocking ion channels and resulting in insufficient charging and reduced battery capacity. Precautions for charging car batteries: 1. Check the electrolyte: Before charging, inspect the electrolyte level; do not charge if the electrolyte is insufficient. 2. Monitor the density and voltage of the electrolyte: During charging, pay attention to the density and voltage of the electrolyte, and check its temperature. 3. Ensure good ventilation: The charging area should be well-ventilated, and open flames are strictly prohibited. 4. No unattended charging: Charging is prohibited when unattended.