In this episode of his series of podcasts looking at the Apple Watch, David Woodbridge demonstrates how to charge the Watch and check its current charge level.
Great job with the podcasts so far.
First of all, yes in my experience we can not use voice over when the watch is in power reserve mode; I guess Apple sees voice over feedback as one of the extra battery hogs that the feature kills. I think this is unfortunate and hope it is changed.
Secondly, in my experience holding down the friends button will actually bring back voice over, without you having to take off your watch or anything. The thing to remember is that when you come out of power reserve mode the watch has to reboot, so it takes a little while.