The kickstarted Pebble smartwatch is now a division of Fitbit, so they may "reduce functionality" on all the watches they ever sold

This is what I’m doing. I actually run the android watch down less often than I did with the Pebble because if you do it every night it’s really easy to put it there at the same time you put your phone there. Whereas with the Pebble if it’s ‘about a week’ then it takes mental effort or setting up an alarm to charge your watch!

OTOH you are now committed to bringing your charger along even on short overnight trips.