The advantage of a watch that only needs to charge every few weeks is that it likely doesn't need a lot of time to top it off if you're charging it daily (unless it has a massive battery or only charges extremely slowly). When I wore Pebble watches, charging them while I was in the shower was plenty of time to last until I showered the next day. With my Apple watches, I've gotten into the habit of not wearing them for a while in the evening as well as my morning shower.