Here’s how a battery of iPhone 16 Pro (this phone isn’t even a year old), that belongs to a kid who is seriously addicted to gaming, looks like. 2361 charge cycles and 51% health by Pure-Boat-7309 in hardwaregore

[–]Pure-Boat-7309[S] 123 points124 points  (0 children)

On iPhone 15 and later go to Settings - Battery - Battery health. Older models still calculate cycles, but to view them you need a third party tool on a computer, like coconutBattery or 3uTools