Luckily, you can have more than oneThe 1 hour of battery life seems like the bigger issue. Without battery power, it won't even work in the country you bought the watch.
Watch paired to your iPhone, so for those 24 hour talk-a-thons, just get 24
Watches. Get the Edition ones, as you don't want to be gauche.I'm all about solutions, not problems.
Truth be told, however, you can probably get away with having just 4, as you can charge
Watch #1 as you use 2-4, and just round-robin them.