Ugreen Power Bank portable charger for Apple Watch
Ok, this isn't quite as cool as the one DarlaMack showed, but that one appears to be vaporware.
This one is currently (lol) available. It comes with the magnetic puck so you don't need to get/use your own. It has a 2200mA battery and can also charge your phone, or at least perk it up. There are four LEDs to advise you of it's state of charge. It can be charged from a micro-USB (ugh) port when connected to your computer or your USB wall wart.
Many of us don't need to charge during the day, away from home. And others do. Still, this could be handy to have anyway. I've seen the price vary but hover around the $60 mark. Given that it comes with an induction charging puck, it's not a bad deal. I might give one a try.
https://www.amazon.com/Magnetic-Wire...mUvbUpU2913345