General motorcycle battery is 7AH 12V. The standard charging current is adjusted to 0.7A and can be fully charged for 10 hours. Note that the floating charging voltage should be larger than 12V and less than 14.5V. If the battery performance is good, if allowed, the current can be increased to fast charging, generally added to about 2A, more than 3 hours can be filled. Battery charging, and water is the same reason. It flows from high to low, and the greater the height difference, the greater the velocity. Therefore, the voltage to charge the battery must be higher than the nominal voltage of the battery itself, otherwise it will not be filled. The so-called regulating current is actually the regulated voltage, the voltage is high, the current is large, and the charging time is short. The only thing that must be noted is that the temperature of the battery cannot be high, and once the temperature is found to be high, the current is immediately reduced, that is, the charging voltage is reduced. Generally, slow charging is better, the battery will not be damaged, and the use time is long.