This is very easy to explain, first of all, when we charge, if it is a fast charge state, the charge shows two lightning, when it is an ordinary charge, it will only show a lightning, if your screen shows a lightning, you can look at whether the self-charging cable and charging head are original, if not, it may show ordinary charge. In addition, if only the charging line is not the original charge and the charging head is the original charge, it will be slow, and it is recommended that you use the original charger so that the charge is faster.