This is another good use for the solar panel used on the huge amounts of garden LED lights around, coupled to a portable radio that runs off 2 or 3 AA cells.
Most of us have an old radio lying around, so I based the $5 price on the cost of purchasing/acquiring a solar powered garden L.E.D light.
I suspect there are plenty of scrap ones lying around, not working because of slightly corroded battery terminals in damp environments – the solar panel will probably be perfect….
With this tutorial I have left my radio on now for 4 weeks, (12 hours a day) while I work and it has never let me down, even at a reasonable high volume level.
You could either leave the solar radio out on a sunny wind sill as I do or leave it in the sun outdoors – every so often to recharge the battery’s.