Aside from your phone, some interesting bits of tech can come in very handy during disasters. One example I’ll give here is a solar charger.

For example, while I was cranking my radio to charge my phone, one my friends, an electrical engineer, had a spare solar panel from his office which he managed to rig to a car battery, which ran his laptop, phone, and a lantern. I think he was on the right track with that one.