iPhone 7
Discussion
You are lucky. Ever have the battery replaced? Iphone 14 batteries barely last two years
Never replaced the battery, but definitely does not last as long as it used to. Also am running into the inability to upgrade apps anymore because I can't get a newer operating system.
Used an iPhone 6 until a year ago. Then more and more apps couldn't get updated anymore or I couldn't even install them. The battery became also weaker and weaker. I think it's time for you to get a new one or a refurbished one.