I think you might be right I got my 46mm yesterday - this morning 6am took it off charge and was 100% - now (3pm) it is 10% which makes 9 hours worth of use Only thing that could be draining it is that i work in a low reception area so maybe its working too hard, either way, if it was usuable until i went to bed and put it on charge I would've been happy.  Its a shame as I really like the watch and it may have been better before the update (i'll never know) however looks like it'll have to go back   ... View more