With Hurricane Florence approaching its touchdown, this seems like a valuable resource to have on one's mind. I really hope no one here, or anywhere, really needs to use this life hack, but here it is:
How to charge your phone with a 9V battery
Of course, portable batteries are better, and I'll guess most of us here own at least one of those - if you don't, just go by one already. But, still, even portable batteries go out of juice when not recharged. In an emergency, when everything is empty, this hack could get you just the few minutes you need to survive, or help someone survive.
Be safe out there, east-coasters!