This will require at least some explanation: Started with 3 hours of charging before turning my SP4 on for the first time. While on the changer did 2 updates from Microsoft, turned off all but one live tile, uninstalled some stock apps, (don't ask me which ones as I didn't make notes), connected to WiFi, Installed Firefox, turned off the settings to keep WiFi on during sleep and did some research. All on a local account. On battery since yesterday, installed a mail client, sleep quite a few times by closing the lid. Signed into my Microsoft account, updated 16 store apps, 2 more Microsoft updates, the last only being a Defender update, did more research, using Firefox, made notification and privacy adjustments, (quite a few as I've been through every setting at least 3 times, mostly because a few changed when I went from a local account to the Microsoft account). Since being on battery I have briefly launched Edge twice but I disabled it and a few other things in the background tasks section of settings. Downloaded and installed Macrium Reflect, did some deep disk cleaning and restarted 4 or 5 times. @GreyFox7 unfortunately, (or fortunately) I haven't done anything with Cortana (yet). I'll let you see a photo of my current battery stats and you can decide if what I have done was a benefit. I said at one point I thought I would get 7 hours from a charge, Apparently I was wrong. This is off my first and only charge to this point and it has been on battery since yesterday.