Can confirm, I regularly get about 9 days of charge on my PineTime, running the latest PineTimeOS release. Its gotten better and better over the years, and the functionality keeps coming ..
I used to use the PineTime with PineTimeOS, but mine eventually broke (corroded inside), but not having WiFi made it annoying to develop for. With WiFi suddenly you don't need to communicate regularly with a phone and the possibilities really open up.
