Aaaah! Thank you for clarifying this. It IS a significant...

Aaaah! Thank you for clarifying this. It IS a significant difference.
So, I wonder how long they will last, and if they do degrade over time.

Ampere/hours is a measure of STORAGE capacity, not generating capacity.
Capacity to GENERATE is measured simply in amperes.
So, are they a storage device (battery) or a generating device?

If it's a storage device (but NOT a generating device) with the sort of capacity they are talking about,
it might also be possible to charge them from other sources, by plugging them into a USB port, for example -
or something similar that might not exist yet.

I wonder if at some time in the near future we will see personal, flexible "battery packs" - a wrist band for example -
which we can plug in and out to run our watch, or our phone, or our pacemaker, or our enhanced reality windscreen display, or... whatever...

Grunt, squeak!