Rhinochugger
Retired Oik
Don't forget to wind them up
Yep, there was a guy who invented a wind-up radio ....... no batteries required but, more importantly there was a missionary organisation in the 60s called 'Gospel Recordings' who made a lightweight hand-cranked record player that, no matter what speed you cranked the handle, would only play at the designed speed - and I cannot remember whether we are talking 33 rpm or 16 rpm (which was a speed solely recommended for speech).Oh yes!
Everything gets charged regularly.. Just like clock-work!
So you could take it literally anywhere, crank the handle and just listen