Charging the battery of a parked car requires following safety regulations and selecting an appropriate method. Common approaches include using a dedicated charger or utilizing the vehicle's alternator. During operation, ensure the vehicle is turned off, remove the battery and place it in a well-ventilated area, open the vent caps, then connect the charger (red clamp to the positive terminal, black clamp to the negative terminal). It is recommended to use the 12V slow-charging mode; charging typically takes 10-15 hours and should not exceed 12 hours to prevent overcharging. For jump-start charging, connect the rescue vehicle's battery in the sequence of positive-to-positive and negative-to-negative. For routine maintenance, start the engine and let it idle for 15 minutes weekly to maintain charge. During long-term storage, charge the battery at least monthly. Additionally, regularly check the electrolyte level (adding distilled water if low), clean electrode oxidation, and ensure vent holes are clear. Note that vehicles with automatic transmissions cannot be push-started, and all onboard electronics should be turned off before charging. A new battery's initial charge should be performed in stages, totaling approximately 45-65 hours. After charging, adjust the electrolyte specific gravity to the standard value. Proper charging extends battery life and prevents starting difficulties or alternator damage due to power depletion.
