（1） First, confirm the polarity of the battery, with the red clamp of the charger connected to the positive pole and the green clamp (or black clamp) connected to the negative pole.

(2) Rotate the current regulator switch counterclockwise to the first position to turn off, then move the voltage selection switch to the corresponding voltage position. Start to rotate the current regulator switch from weak to strong, and observe the charging current meter to determine the appropriate charging position (generally the normal charging position).

To extend the lifespan of the battery, please charge it with an electric current equal to 1/10 of the battery capacity. If necessary, you can increase the current to reduce charging time. Without any instruments to detect whether the battery is fully charged, you can simply remove the battery cover. If a large amount of bubbles emerge, it means the battery is fully charged (except for the case where the battery is defective).

Before connecting or disconnecting the charging machine's cable from the battery, first turn off the power supply.

When charging a battery installed in a car, first connect the battery end that is not connected to the chassis, and then connect the other end to the chassis. The connection point should be away from the battery and fuel lines. Then, connect the charger to the power grid.

After charging is complete, disconnect the charger from the power grid, then disconnect the cables from the chassis, and then disconnect the cables from the battery.

Turn the current regulator switch to the off position. Disconnect the power and remove the battery clamp, clean the dirt on the battery clamp.