[39]First mobile charger | first charger mobile phone
A mobile charger works on the simple principle of conversion of AC (alternating current) to DC (direct current). To accomplish 5V output that is what exactly needed by the smartphone it has to do step by step working. Step downing: In order to produce 5V output, it needs an input voltage.
To charge a battery, phone's charger take input from higher voltage, pressure which allows current, volume of electrons to flow from charge to the battery. Inside the phone, the battery act as a container that keep the current flowed from the charger and reused it to power all the components of the phone.