This is how to make a power bank from a full power 18650 battery. It is hoped that with a parallel 15 cell 18650 battery that has been shorted and selected with an amperage value above 1 ampere, it is able to produce a long duration of use, besides charging the cellphone, it can also be variable voltage from 5 volts to 24 volts. So we turn on the 12 volt led light or just adjust the output volt needs. Hope it is useful. Wassalam..
18 ноя 2021