I’ve only been using iPhone 6 Plus for a day, but I’ve already noticed that the battery life is fantastic. I used it all day yesterday and didn’t charge it overnight and it made it past noon this morning too. I’ll be looking at this more closely, obviously, but I can’t recall a smart phone with that kind of staying power.
I think it’s fair to note that most people would be quite happy with the iPhone 6 Plus or, if they’re not interested in a phablet, the smaller iPhone 6. This is a wonderful smart phone overall.