It’s because of this great guy, the physicist, who invented a battery, we’re able to carry electricity in our pockets now-a-days. His full name is quite long, Alessandro Giuseppe Antonio Anastasio Volta and has his birthday today, 18 Feb.
The voltaic cell is derived through the chemical reactions between Zinc and Copper and its electrolytes Sulfuric Acid mixed with Salt water. So, electrons starts to flow from negative terminal to positive terminal and that’s how we got the voltage or electricity. That’s something amazing, he did.