I´m wearing a FR245 Music and want to upgrade to a Forerunner with open water tracking. At the end I vacillate between the 745 and the 945 LTE (the 945 ist too big for my small wrist :)). My question is, whether I can switch off some of the sensors (e.g. barometer, NFC) inside the 745 in order to save battery time. Is that possible?