Yes, according to your car battery capacity to adjust the charging current, generally using the battery capacity of one-tenth of the current charging (such as 45A battery is charged with 4.5A current for about 10 hours, the smaller the current, the longer the time). I don't know if your regulated power supply has a constant current function, if it does, adjust the current directly, and the maximum voltage can be set to 14.8v. If not, you can only take the voltage as the standard, connect the charging line to turn down the voltage regulator power knob, turn on the power slowly turn up the voltage, ensure that the current does not exceed the battery capacity one-tenth and 5A, after a while the current will slowly decline, then the voltage will be higher, and finally when the voltage to 14.8v (can not exceed), the current becomes very small and the battery is full.