I posted this on the Battery life thread, but just in case you haven't read it here it is, you can always try some of the things I have done and always do when I get a new Android phone, and with the same usage and apps I always have with others phone, this one has the best battery life I've ever experienced, by far, averaging between 7-7.5 hours of SoT on my normal usage. What I posted here is not my normal usage, but it gives you an idea of how good it may also be with a lot of Standby time. Check it out;
My usage since the past Friday hasn't been normal, I've been using it a little more lighter than I always do, but even with that in mind, for me is quite impressive what this phone has given me for the past 4 or 5 days, I mean, I charged it to 100% when I went to bed Friday night, I unplugged it at 6:00am Saturday morning, and even before I ate my breakfast I had already 1 hours and 45 minutes of SOT with Non Stop Web browsing including here, reading my magazines on Play NewStand, syncing my 2 Gmail accounts with dozens of pending emails, watching a couple of YouTube videos, etc... After all that I was still at 75%, almost 15 hours later and after syncing with Gear S2 watch for about 5 hours and a lot of other normal Saturday usage for me I went to bed with 50% and over 4 hours of SoT. I wanted to see how far I could take it and I didn't charge it overnight, when I woke up on Sunday morning at around 8am it was still at 48%, so Doze was doing a great job. Forgot to mention that I ran 5K each day using my Gear S2 and the phone using Location in High Accuracy.
I used it a little and decided to put it to my fast charger for a quick charge before I went out again and unplugged it right at 97%, so to give you an idea here are my battery stats on still that Quick Fast Charge I did on Sunday morning. No Power Saving Mode and no Special stuff at all.
If you want to know a detail of what I've done to the phone, you can have an idea of what I always do by looking on one of my previous Battery Tips and tricks on the S5 and S6 forums, but in a quick summary.
1-) Removed Bloat. Most of Samsung apps only left SHealth, Samsung Gear and Milk Music. Disabled ALL T-mobile apps except Visual Voicemail, some Google apps I don't use such as Chrome (using just Samsung browser) and Google Play Music and removed Facebook (just use a Browser bookmark shortcut) and Amazon App.
2-) Turn off unnecessary Google and Samsung Services running by default, I always sync, emails, calendar, apps, people, contacts, drive and photos on my personal account and just calendar and email on the business one, all the others are disabled if I don't use them or simply not sync them so I only use them when I enter the app.
3-) Turned off T-Mobile Wifi Calling and VoLTE, never use or even need them.
4-) Turned off all Improve Accuracy options in Bluetooth Settings.
5-) Turned off Google Location History (biggest battery drainer since Google removed Location reporting and incorporated into the Location History. Location in Power Saving Mode (Wifi and mobile networks only) unless I need to use it for pinpoint locations (when using Maps or SHealth in my 5k runs) in which cases I simply change it to High Accuracy (GPS, Wifi and mobile) and once I finish I set it back to Power Saving mode.
6-) Turned off Nearby Device Scanning under Settings-More connection settings.
7-) Turned off Smart Network switch on Wifi Settings and under Wifi Advance Settings turned off Hotspot 2.0 and just Keep Wifi on During Sleep.
I've been using less and less the Wifi, sometimes I leave it on but most of the time I have it off, very different approach than all my previous phones, simply because I've been noticing lately, contrary to the old school knowledge, that for some strange reason this latest flagship phones are getting better battery life on cellular data Vs Wifi.
9-) I just turned off on Friday the app optimization feature on the Battery settings that I've been using since it was introduced on the S6/S6 Edge. It may be too soon to have a definite conclusion but it seems that my battery got even better after turning it off, like if it's not as useful on Marshmallow as it was useful on Lollipop.
As you will see in my screenshots below there are a couple of thing that I've been doing different with the S7 edge that I never did before such as leaving Bluetooth on all the time and the Screen brightness is in Auto and in about 35-40% all the time, the screen looks so beautiful and the battery is so good that I decided to leave it like that, at least for now. Getting more than 4.5 hours of SoT on over 2.5 days after unplugged, it's simply amazing for me and my usage.