They need to come out with a solar powered model. I don’t need one but..
Actually, Casio already has a solar powered G Shock and I have one, wear it every day and keeps perfect time and easily converts between time zones if you travel as I do. It has time, date & day, I love it and it cost much less than i watch. Check out Casio on Amazon.
Sorry, not meant to be an endorsement but it really kinda is.