The time that the charging bin is full is related to the output current of the charger, the battery capacity of the charging bin, the remaining electricity and the charging conversion efficiency. Assume that the battery capacity of the charging bin is 300mAh, the charger output is 1A, and the charging bin is charged from the 0 charge of the charging bin, the charging conversion efficiency of the charging bin is 100%, and the full time =300÷1÷1000×100%=0.3 hours. Of course, if you want to calculate the accurate full time, you actually need to consider the remaining power and charge conversion efficiency, especially the charging efficiency can not be 100%.