Step 1: DC to DC Converter :
The video link for the making of a simple dc to dc converter has been provided below.
Its function is to step up the input applied voltage by 3 to 4 times which can be adjusted by by choosing different values of inductors.
Transistors used for the circuit are 13009 npn.
Step 2: 12v Battery :
Step 3: Connection & Testing :
Connections are simple.
1- Connect the +ve of the rectifier to the +ve of battery & -ve to the -ve.
2- Connect the A.C input of the rectifier to the output wires from the dc to dc converter.
3- Connect the input wires of the converter to the mobile charger (+ve to +ve & -ve to -ve)
4- Simply turn on the charger switch and it should start charging.