I have a series 4 apple watch. I was getting 17 to 18 hours per day before I had to charge my watch. I installed version 7.01 and my battery life dropped to 3 or 4 hours per day. I called apple and they said that when you get a new version installed it takes more battery life. I said that is crazy, that clearly there was something wrong with this new version of the operating system. She also said there was no way to go back to a previous version. She said I need a new battery and it would cost $325 for a service call. I went nuts and she changed it, said, "oh wait" a new battery is only $79. Cleary there is something wrong with this version of the OS. You shouldn't have to buy a new battery just because you upgrade to a new OS. Or at least you should be able to go back to a previous version. I have an Iphone 11 pro and my apple watch and my wife is about to buy an iphone 12 max. I am seriously thinking of changing my mind and switching to Samsung. They should either fix this OS or give you a new battery. Is this happing to others?