Hey Mark, was just searching Nostr and came across this!
I have one and have charged it three times in 6mo of having it and using it pretty frequently for testing and personal use.
IIRC you can expect 8+ hours of screen-on time, which equates to a looooot of usage with a HWW.
Happy to answer any other questions you have!
We've also compiled a lot of reviews you can watch/read here, and are collecting testimonials to share as well so other's can see what those outside of Foundation think of Passport 😃
https://twitter.com/FOUNDATIONdvcs/status/1598351947022704640