> You can get crappy 2aaa-powered FM-only earbud radios dirt cheap at places like Walgreens. The
> circuitry is not too bad, they're just cheaply made, you have to jiggle the earbud wire to make good contact, etc.

The battery life may be very poor. I've seen cheap single AAA ones that claim 5 hours. In an emergency you might want it on continuously, so as not to miss important bulletins, so while 5 hours is better than nothing it's not very good.