Using this charger is easy. First, plug the correct power supply into a power outlet. Then, place the batteries you want to charge into the charger's ports. You can charge multiple batteries at once, which is very convenient. When using the charger, make sure the power supply is in good condition and the charging environment is dry. Avoid exposing the charger to water or high - temperature areas. For maintenance, clean the charger with a dry cloth regularly. If you notice any problems with the charger or the batteries, stop using them immediately and contact customer service.