My one Brother-in-Law had a iPhone 13 with a battery bordering on 80% of original capacity so he asked me if he should go to Batteries Plus to get it replaced (he had a $30 off coupon). I mentioned that battery replacement on the iPhone 13 is through the display panel which requires destroying the waterproofing seal between the front glass and the frame rails, plus disconnecting multiple ribbon cables. I suggested taking it the Apple Store to have the replacement done as Apple would reseal the front glass and provide a better warranty afterwards.
Then I mentioned that his iPhone was worth $250 in trade for an iPhone 14 or 15. He had thought about it since if he replaced the battery, he would still have a four year old iPhone. He surprised me by getting the iPhone 16 instead. After setting up his new phone, he commented how much faster accessing his email was. I believe the amount of RAM has quadrupled between the 13 and the 16, so that could factor in.
But, he had to get a new Otterbox case. None of the control buttons matched up.
