What happens when both of your cell phones die?

This happened yesterday...it's a very ominous feeling.  You have 14%...then 8%...then 4% and you are just praying that you can get the bus route on the phone with the last few minutes of power you have.

Then they both die within a minute or two of one another, and you've nothing but your wits about you to rely on.

So you just walk until you hit the train red line.  And you're fine.