Requirements
1. USB female connector
2. Voltage regulator IC 7805
3. 5mm LED
4. 470 ohm resistor
5. 9 Volt battery connector
6. 9 Volt battery
7. 2 Bottle Caps (1 green – 1 red)

Procedure:
1. Make a hole in green bottle cap to fit USB female connector. Fix USB connector in it with glue

2. Make a hole in red red bottle cap to pass 9 Volt battery connector wires. Paste battery connector on hole and pass wires through the hole.

3. Join red wire with positive side of USB female connector and green on negative side with the help of soldering iron.

4. Join voltage regulator on the other side of the wires as shown in circuit diagram.

5. Also join battery connector with voltage regulators shown in circuit diagram.

6. Join 470 ohm resistor on one wire if 5mm LED.

7. Make a hole on side of a green cap and pass LED through it and voltage regulator as shown in diagram.

8. Cover the joints with glue to avoid short circuit.

9. Join the caps and connect battery. Your Mini USB Mobile Charger is ready.

For More Details please watch this video: