Parallel charging of batteries may cause certain hazards.
Because the voltage and internal resistance of the battery are different, if the battery is charged in parallel, the battery with a high voltage will be filled first, leading to the termination of the charge, and the battery with a low voltage is not yet full, which will make the service life of the battery shorter.
In addition, parallel battery charging may also lead to short circuit or overcharge of the battery, which may cause safety accidents and harm personal safety.
Therefore, when using the battery to charge in parallel, we must choose the same type of battery, and perform the correct operation according to the actual situation.