I have already ordered one and I will test with that one.
I also need to add some notice to the article that my first approach failed.
Regards, vermaden
I haven't tried with a laptop yet, but my phone indeed kept steady power in to it when I connected/removed a charger from the power bank! Neat!! Indeed seems like some level of ups capability!
Confusing naming, but I had & adore ZMI's earlier "20k" power pack. The new No. 20 is 25Ah/2 usb-c/210w, the old 20k Pro is 20Ah/1 usb-c/65w(+ 2 decent usb-a)... But damn the old 20k pro is slick slick slick, great size. I miss it dearly. It's been on some best battery lists & you can still get some on eBay on & off, but it feels like no battery has been as well proportioned since.
It also had something that seems so weird toe that doesn't exist elsewhere: you could put it into a mode where it was also a USB hub with the usb-c device being a host to the two usb-a ports. The usb-a ports only got the 0.9a in that mode, no quick-charge or whatever, but usb-c still got full power & the ports were powered. The idea of a USB charger that also acts as a data hub seems drop dead obvious, and I largely suspect there was some kind of wild IP hijinx/conspiracy that blasted the ZMI 20k out of existence for being so rad.
Thanks for the suggestion! Go ZMI.