It depends on the charging current. 1, the battery generally retains more than 20% of the electricity, the chemical conversion efficiency of the battery when charging is about 50%, and the full battery needs to increase 150%*80% of the electricity.
2, the best charging current of the battery is 10% of its capacity, but the charging time needs 150%*80%\/10%=12 hours, plus about 1 hour of segmentation charging increased time.
3, in order to meet people's rest and rest time, in the design, the charging current of 13% capacity is generally used, so that the charging time is at least 150%*80%\/13%=9.2 hours, plus about 1 hour of segmentation charging increased time.
4, fast charging, generally with 20% of the battery capacity of the current charging, charging time is 150%*80%\/20%=6 hours. The use of higher current charging, although the charging time is shortened, but the battery has harm, careful use.