[kentlyons]

Several years ago I did some research (published paper here: http://kentlyons.net/pubs/dumbwatch-iswc15.pdf) and one of the findings I thought was interesting was there were 3 groups of people that implied different battery needs. One seemed similar to what you describe: people that took their watch off at night (so could charge it then). Another group wore their watch 24/7. And the final group which I wasn't expecting, but made sense in retrospect, was people that only wore their watch when out of the house. When they got home they'd take it off like setting down their keys.