In these complex times in which we are more exposed to disasters, any trick to survive is valid and a trick is what it does while we don’t have electricity networks.
Although you can also remain without access to electricity in less compromised situations, such as when you are camping in the mountains, in any case, these three steps will help you get out of the emergency.
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You need:
The USB adapter for the cigarette lighter of the car, the cable of the phone itself, a 9-volt battery, a metal clip and a pen spring or a key. What you are going to do is conduct electricity from the battery to the mobile.
Step 1: open the metal clip and wrap it around one of the battery poles
Batteries or batteries have two terminals. One of them will have a positive sign and the other a negative one. By wiring these two poles, the electrons flow as fast as they can from the negative pole to the positive pole. To generate this electric field we use a metallic object because metals are good conductors of electricity. The first thing we do is open the metal clip and wrap it around the negative pole of the battery.
Step 2: Put the car adapter on the positive pole of the battery
The next thing is to place the car adapter on the other pole. Now we are ready to generate the electric field. In this case you will use a clip, but it could also be the spring of a pen.
Step 3: Push the clip onto the metal part on the side of the adapter
The only thing missing is for the two metals to make contact -the clip with the metal part of the adapter- so that the electrons flow and thus generate electricity. When contact is made, electrons can travel freely from one pole to the other.
The only thing left to charge the cell phone is to plug it into the USB socket, the same way you charge it when you plug it into a computer. When the electrons are passing from one pole to the other, it is the precise moment to connect the cell phone through USB.
This homemade method to charge the mobile is not the only one. You just have to look around the Internet and you will discover several similar ideas -others not so much- that work with the same principle.
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Taken from BBC