https://forums.macrumors.com/threads/what’s-your-battery-capacity.2112507/My launch day 8+ battery health is at 93%. Have I got anything to worry about or is the battery health section not that accurate? iOS 11.4
Not normal. Get it replaced by paying USD 29.
If you’re using fast charging then that’s the culprit.
Through December 31, 2018, the out-of-warranty battery service fee is $29 for all eligible iPhone 6 or later models. Battery service at $29 may be limited to one repair per iPhone.
No and no.
Again, the $29 battery replacement program is for out-of-warranty devices. An iPhone 8/8+ is still under warranty, so, ineligible.
I fast charge once every day and my day one 8 is at 98%. That said, if OP is frequently running the battery down multiple times per day and fast charging multiple times a day and or heating up the device frequently (eg. really heavy use, sitting in a hot car), yes, the battery might be getting stressed more than most people. But since Apple supports USB-C charging on their devices, fast charge is a safe charging method.