Should a car battery be charged with 12 volts or 24 volts?

[SanLincoln]

Car battery charging voltage varies depending on the type of vehicle. Passenger cars generally use a 12V charging voltage, while large vehicles typically use a 24V charging voltage. Below are some key points for car battery maintenance: 1. Inspect the battery: Check for any obvious leaks or deformations. If there are signs of deformation or leakage, replace the battery immediately to ensure driving safety. 2. Battery terminals: After confirming no issues, securely connect the positive and negative terminals. Turn on the vehicle's electrical system for self-check and check whether the battery electrolyte level needs replenishment. If necessary, add distilled water or a special-purpose liquid—never use mineral water or tap water. 3. Starting: When starting the engine, note that the cranking time should not exceed 5 seconds, and the interval between attempts should be at least 15 seconds. If the engine fails to start, check whether the ignition coil is aged or malfunctioning.