Anker has a power bank with integrated charger[0], or charger with built in power bank. Don't think it's made to be used as a UPS, but maybe it can be.
> Inline USB ultracapacitor banks seem like a reasonable product too though.
I actually saw just that in a GreatScott Youtube video about Aliexpress gadgets just the other day[1]. Not sold as a UPS, but rather a power filter or buffer.
Laptops can run off of any USB-C power bank now, so it's no surprise there's no market for something like this. Cool product though!
It's on the line voltage side like any other UPS, so not as efficient as you could be with a solution that didn't have to convert AC to DC then back to AC then to DC again in the brick. But with Apple's proprietary charging connector soldered to the device end of the brick, what else can you do about it?
> Inline USB ultracapacitor banks seem like a reasonable product too though.
I actually saw just that in a GreatScott Youtube video about Aliexpress gadgets just the other day[1]. Not sold as a UPS, but rather a power filter or buffer.
[0] https://www.amazon.com/dp/B085CFD3Z9/
[1] https://youtu.be/fUdlfc1nJcY?t=117