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The 7 and 7 plus batteries are crap.

My wife’s 7 plus launch day phone didn’t even make it two years. It was reading 86% and the battery life was terrible. It would only last about 4 hours with light use.

My 7 is 11 months old and it’s at 92% health. I’ll probably get it replaced sometime in December at the discounted rate.
 
My 7 Plus is doing great! I'm at 91% capacity after nearly two years. I never have trouble getting through the day. To be fair, I'm charging on my 45 minute commute too and from work, so that helps, but when I get in my car to leave for the day I'm rarely below 50%.
 
My launch day 7+ is getting pretty crappy. Battery health says 87% but I suspect it’s lower than that. I get the 20% warning before I leave work pretty much every day. Up until about May I would never get it until later in the evening, and prior to the last year I would rarely get it at all. I don’t believe my usage has changed very much, either.
 
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