The battery on my 17 month old iphone 6s+ seems to be dying quite quickly. I have to charge it constantly as it dips way faster than it used to. I could use it for an hour and 30 percent is gone. I just keep it plugged in to either an Anker battery now or an adaptor. I tested it with some apps such as Battery Life and the battery wear level shows 45.5-55% of total capacity. One app shows 1500/2750 maH under battery health. I checked battery usage and most of the battery is being used for browsing(19%) and instagram(13%). The rest of the apps are at about 3-4% so no significant app drain. I have Applecare and I think Applecare page stated anything under 80% wear level under warranty warrants a free battery replacement. Is this accurate? I am setting up a genius appointment but would like to know what to expect financially. I remember taking in my 16-month old iphone 3g to apple years ago as the battery would not hold charge. I had backed up and reset it before going(apple phone tech advised me to do this) in for what I thought was an issue covered by applecare. The genius gave me a hard time about resetting the phone before I came in and told me to come back in three days so they could read the stored battery data. Told him that the apple tech I spoke to on the phone suggested resetting, the battery was not performing properly and escalated the issue. They finally relented and swapped out a refurbished 3g. Thanks.