My iPhone - Ding! Needs replacement. I had noticed wonky battery life recently (past 6-8 months) and chalked it up to age (of the phone, not me, my battery is barely holding on!)

Wife's iPhone - Nope. Good to go!

I am not looking forward to the replacement process as I'm told that even though you backup your phone, a lot of tweaks, settings, etc. get lost during such a battery replacement. If it's anything like the "simple" iOS upgrade, I'll have a lot of work to do.