Power Bank

Everybody knows the feeling when you  are waiting for very important message, chatting with your friends or you really need your phone to call somebody, but... suddenly your phone is out of battery. You are angry, because there is no socket or you forgot to take your charger. What to do then? Fortunately, nowadays we have Power Bank! Thanks to this small invention we can charge our cell phones wherever we want.

 Power Bank is popular for charging smartphones and mobile tablet devices. Power Bank is a portable device that can supply USB power using stored energy in its built-in batteries.   

Did you ever wonder who invented Power Bank? This small charger was invented by the college students. They assembled power bank with AA bateries in 2001. At that time, the battery had short cycle life and big size.  It took some time before power bank became popular, but in 2009 after some year of developing it finally got into people’s eyes. Nowadays, it is a common alternative to traditional charger, and so many people use this.

Thanks to those students we can enjoy using our cell phones all the time.   

 Do you think it is a true story?