What do you not get?
[rephrase]
I have a watch which has a battery and a solar dial (clock face). It charges itself and I have used for a few years without the need for taking off and/or charging/winding it manually.
[/rephrase]

That would be something spectacular for such gadget but current power hunger is the barrier.
My first phone lasted for a week. And even more than 2 days playing mon-stop with it.
But that is not to stop or change.
And definitely full OT, so I will break now