My IPhones usually last me 7-10 years then I trade them in looking like brand new. But I do invest in an Outer Box because it gets dropped quite a bit. Never ever had to get a battery for one yet.
I broke 5 yes 5 otters, had to send pics of them, once they saw how bad they were they’d send one out free of charge (lifetime warranty) Drop one on cement from 5 feet up, you’ll get the pic.