According to AnandTech the 6 Plus is supposed to last quite a bit longer, I always wonder about these tests. I was going to get the 6 Plus but didn't like the big bezels, I'm glad I held back, I would have thought battery life would have been much better.
Tests concluded 14h. That's more than anyone else BTW. Every single IOS update there is a lot of whining about battery life. This turns out to be true for a small fringe of people (usually for then it gets fixed by 0.01), but for most its totally a configuration difference, background downloads, the battery not being calibrated, etc.
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Facebook was the main culprit.
Today still having issues and I just disable Handoff & Suggested Apps.
Currently at 51%.
Yes, facebook... And similar apps doing the same... Changes affect the way apps work... Yada Yada Yada... Seems like come kind of flashback to the last 7 years.