What Happens When Charging a 12V Battery with 24V?

1 Answers
StSavannah
07/30/25 1:59am
It may cause the battery to explode or burn out, which is quite dangerous because the charging current is too high. The battery may swell and become damaged. V stands for rated voltage, and 12V is the battery's voltage, meaning the optimal operating voltage for the device is 12V. You can use 18V to 15V for charging. If possible, monitor the charging current or observe the bubbling of the battery fluid. Slow bubbling is acceptable, but excessive bubbling indicates the charging current is too high, and the voltage should be reduced. Battery usage precautions are as follows: Avoid parking the car in an open parking lot for extended periods. If long-term parking is necessary, remove the battery to prevent freezing damage. Car engines are harder to start in winter. Each attempt to start the engine should not exceed 5 seconds, with a minimum interval of 15 seconds between attempts. If the engine fails to start after multiple attempts, check other potential issues such as the electrical circuit, ignition coil, or fuel system. Avoid continuous and repeated starting attempts, as this can lead to battery damage due to excessive discharge. Car batteries should be charged regularly. A battery left unused will gradually self-discharge and eventually become unusable. Therefore, start the car periodically to recharge the battery. Clean the battery terminals periodically and apply specialized grease to protect the wiring harness. Regularly inspect the battery's accessories and connecting circuits. Avoid using car electronics after the engine is turned off. Using the battery alone when the engine is not generating power can cause damage.
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