When the voltage reaches the critically smallvalues   that make the device's operation itself problematic (usually a range of 2.3-2.5V), then the corresponding MOSFET transistor is turned off, which is responsible for supplying current to the mobile.
Lapho voltage ifinyelela amagugu ezibucayi ongaphakeme ezenza ukusebenza eziyinkinga zedivayisi ngokwayo (ngokuvamile in the 2,3-2,5V ububanzi), khona-ke icishe elihambisana MOSFET-Transistor, okuyinto unomthwalo supply samanje ifoni ephathekayo.