If a power failure occurs or if you are not close to a source of electricity, at that point you cannot do much if your phone runs out of battery. However we have the perfect solution for you! Watch this video, and you will learn that there is an alternative way to charge your mobile phone. For this amazing trick you will only need a lemon. You will not believe it, but it is try.
The lemon juice acts as an electrolyte to the two metal electrodes which are generally made from nickel and copper. If the electrodes of the battery charger are made of magnesium and copper then you will need less lemon, because too much lemon will create a greater voltage.