Southern, sounds like you had a good day in a long time? You're HR band won't connect, because it's not a Bluetooth one, being Garmin it will work only on Ant+ devices. I have found altitude records greatly over, along with cadence (which you also need a BL sensor not Ant+) in order to record on the phone app. Wouldn't worry too much about battery usage? Sure it's gonna get less as you improve, however 1% for 1 mile riding the conditions you did today ain't bad. What a positive? You climbed a hill that normally would have defeated you, what a start. I'm sure riding the bike today for the first time,will have not been as settled as in the future. A few rides, fine tune your position, understand the bike and gearing better, then you're going to be more relaxed and smooth, resulting in using less energy, lower HR and a more pleasant cycling experience. Enjoy.