Powers banks are important as these power banks are basically the backup power that is carried by us to charge phone battery or iPod battery.! Its useful for all category for people as the phones these days have a lot a APPS that consume battery in a few hours and then your left with no power on your phone on an important day. Or on a rainy day where there is no electricity the entire day.
So its a must buy for every home since its a life saver and it can be easily carried around in your hand or pocket.