When you need a cellphone and its battery is over then you run to fetch the charger and connect it to a power line.

Have you ever wondered what would you do if there is a complete power failure...?

Here is a simple solution, a liquid battery that can be built with an investment of $20 and a time of three hours. Though I am not very sure that this can run your cell phone, but it will surely give you an idea of how things work.

All you will need is copper sulfate, distilled water, copper electrodes, and crow’s-foot-zinc electrode.

All you need to do it is to:

• Pour copper sulfate (the blue granules) over a copper electrode in a glass.

• Fill it with distilled water.

• Add a crow’s-foot-zinc electrode, and short-circuit the battery for 24 hours to kick-start the battery reaction.

• Connect to the device of your choice. Yields one volt.

Via: popsci58135