I have just canned my last battery powered watch. I got tired of having to have the batteries replaced and worry about whether or not they were still water proof, plus the last one to go ate batteries about one per year. So I am now down to two automatics; Marathon GSAR, Sieko 5, one mechanical Swiss Army Airboss, and two solars; Casio Riseman, Casio Aviator. I wish my ham Radio hobby could be battery free!