My ZMI PowerPack 20k & 20k Pro's are still my daily drivers (good for 45W/65W only, but fine for my use), but I did snag one of these off the indiegogo (for the high-speed dual port capability). I hadn't realized it has this uninterrupted capability- awesome. I use USB-C to dc-barrel jack adapters, and this it an makes an affordable, reasonable capacity UPS.

It seems to still be available on alibaba and ebay. https://www.aliexpress.com/i/3256802290206038.html?gatewayAd...

It is truly excellent seeing battery packs with >1 input-output USB-C port (100W and 45W combined).

ZMI Ambi (10k mAh/18W) does as well. Likely discontinued and replaced by a newer model now though. Perfect for a rpi UPS.