Yep my S7 edge battery life is not as good as it used to be.
In fact, when I got it, it was as good if not better than my previous phone, a Sony Z3 which were renowned for having great battery life. However, it quickly deteriorated, and now its really not very good if I'm honest. Like others, it seems fine if I'm using it indoors with Wifi, it can last many hours of constant use, but then so could many of my other phones.
However, when out and about, this seems to be what drains it. It can easily lose 20% of the battery between say waking up on a morning, and travelling to one of our scottish offices from Newcastle without even really ever using it.
Same story when I went down to Leeds this weekend for a festival. What was interesting, is my friend has an iPhone 7 (standard, not plus), and he was down to 2% on the morning we came back, I was on 17%. By the time we got back, his phone was still on 2%, mine was down to 5%.
Not really very good performance there, and I've actually now for the first time bought myself a power bank to take with me on trips.
I'm convinced this will definitely be my last Samsung phone. Between issues like this and the poor update situation, not to mention the bloatware and random lagging (not terrible but shouldn't be happening on a device with these specs IMO) and I think I'll look elsewhere for my next device.