These days, we use our phones for pretty much everything. Texting, emailing, banking, finding out where the closest McDonald's is and so on. As a result, we become pretty useless when - God forbid - the damn thing runs out of battery.
Anything could. Quite literally ANYTHING, as shown in this fantastically over-the-top Super Bowl spot for Mophie out of Deutsch LA and directed by Christopher Riggert through Biscuit. Fantastic VFX from a52 too.