Nomophobia?
A stressful situation: you're waiting to receive an important call or you're stuck in traffic and your smartphone's battery is dead. The fear of not being contactable at all times even has a name: nomophobia.
Chatting, listening to music, e-mailing, navigating and, of course, making phone calls - our smartphone is our constant companion, and the battery can sometimes need an energy boost while you are out and about. The power banks come precharged and can be used immediately.