Usage time:
generally speaking, after the charging is completed, hair clipper can be used continuously for about 45 minutes. However, it should be noted that as the charging times of hair clipper increase, the efficiency of the battery decreases and it will not be used for such a long time. So try to charge it in time and don't let hair clipper be completely empty.
Pay attention to the use of limit comb:

limit comb is very useful for novice haircuts, so as to avoid the situation of different lengths of haircuts. Pay attention to using the maximum stopper as much as possible, and keep it as long as possible when cutting hair, so if it is not reasonable, there is still a chance to remedy it.
Try to avoid charging while using:
many hair clipper instructions say that hair clipper can be used while charging, but for the new hair clipper, this will do great harm to the battery, so try not to do this.