My husband and I use Apple Watch everyday it is really popular here 
Power bank and usb charger for apple watch
There are natural times trough the day when you can put it on charge. Shower time, half hour when chilling etc so you really find a routine and don’t notice it.
I’m not suggesting you go buy one but just to let you know charging is not a major issue.
I just need a boost through the day because I’m using the workout app more and more and sometimes out all day.
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My gripe is hate having to take my watch off…