The battery of my AIWA minidisc went flat and refused to ever charge again;
and this battery was some obscure shape and size that was, after many hours of googling and phonecalls,
absolutely no longer available for replacement....

These days, with a free app, any smart phone and tablet is a good on the spot discrete portable recorder
for quick easy capture of fleeting song ideas and chord progressions...

It certainly beats the old mini cassette dictation recorders...

I hardly ever use my mobile phone for it's intended purpose, instead mostly using it as a camera and recorder...