Check it out, it’s a charging accessory for the Nokia EOS/Lumia 1020. You’ll note we’ve gone back to calling it the 1020 as noted by the Microsoft stock note (unless that was a different device).
This will add some extra power whilst the phone is still in use. It’s interesting to note that usually this is done a third party accessory makers (and thus usually a lot more capacity than 1020mAh, though they are often a lot thicker). Nice to have the option at least as there will be those who don’t mind the added bulk on certain occasions.
We will find out this week what the official name and accessories will be
Cheers Eugen for the tip!