There really is nothing more aggravating than your phone losing power just at the right moment.
It could be anything - you could be just about to get lucky, maybe you're trying to figure out where you're supposed to go or even trying to get out of a place and you need directions. Who knows. Our own Carol Byrne took to the streets of Dublin and quizzed a few randomers on what their worst moment without power was.
Thankfully, that won't be much of an issue anymore once you pick up Coca-Cola's new PowerBar, which works with both iPhone, Android and all major devices!