Sometimes a bit of idle surfing can get you to where you didn't realise you wanted to be...
During a short "free period" I'd been poring over some maps. Real maps. Big flappy unruly Ordnance Survey paper sheets. If you remember these things, you'll remember the faff involved in folding them away neatly after use. You'll likely also remember that repeated use destroys any stressed/strained intersections of folds.
Anyway, duty called so I put away the maps. Some DIY was required, a drill was necessary, and the all-singing, all-dancing one that I'd bought for my Dad (so that I could borrow it permanently) was, for some strange reason, at my Dad's place. No matter, a detour to the local Lidl during a cardio-exercise walk resulted in the acquisition of a cheap cordless jobbie.
Back at the ranch I did the DIY and decided that the cheap jobbie was in fact quite good. So good that I looked into buying a spare battery-pack for it. At some point during the web-search I got distracted by Wikipedia's page on Li-ion batteries and found myself reading about their flexibility (see here).
I got side-tracked by the Miura Fold/Solar Panel Array thing...
And then the dropping penny reached its target.
Yeah, I know it's been done before, but I've a mind to give it a try for myself on a newish real map once I've ironed-out all of those standard-issue O. S. creases. I might start with a Memory-Map printout and work my way up from there.
Here's a YT clip of how it works: