HOMEMADE POWER BANK FOR TRAVELLING

One day, I went to a forest region in India. I have charger but I am not having a power bank with me. In that forest I stayed in a tree house,there was no plug to charge my mobile. In such situation we can use this type of power bank. It is cheaper than the normal power bank. It can hold the charge up to 7 days. But there is a disadvantage in this power bank i.e it is an use and throw power bank and we can't recharge it.

1.Cardboard

2. Aluminum foil

3. Blade

4. Cutter

5. Scissor

6. Non concentrated sulfuric acid

7. Insulating tape

8. Waste mobile charger

9. marker

10.Bowl

Place the blade on the cardboard and the aluminum foil and draw the outline of the blade using the marker. Then cut those outline.

Pour the non concentrated sulfuric acid in the a bowl and soak the cardboard pieces for 5 min.

Take the blade and pieces of soaked cardboard and aluminum foil. Place the soaked cardboard on the blade and place the aluminum foil on the cardboard,again place the blade on the aluminum foil and place the cardboard and aluminum foil on it. Like that do it for 5 times.At last place a blade alone on the aluminum foil. Combine all those card boards, aluminum foils and the blade by an insulating tape.

Cut the micro USB connector from the waste mobile charger and connect it to the battery.

cover the remaining parts of the power bank except the micro USB connector with the insulating tape.