Apple's innovative way to remove the crappy batteries in the iPHone 16 revealed by iFixIt

iPhone 16 and iPhone 16 Plus batteries have an innovative type of adhesive
that can be easily loosened with low-voltage electrical current, such as
from a 9V battery. The steps involved include attaching alligator clips to
a 9V battery, connecting the red/positive clip to the silver tab on the
iPhone's battery, and connecting the black/negative clip to the lower-right
grounding screw on the iPhone's bottom speaker module. After up to 90
seconds, the adhesive should debond and the battery can then be easily
taken out of the iPhone.
https://www.macrumors.com/2024/09/23/ifixit-iphone-16-teardown/
https://www.ifixit.com/News/100352/we-hot-wired-the-iphone-16
Take note, as with all iPhones, you'll be replacing batteries a lot
simply because Apple uses the cheapest batteries it can get away with.
No other company uses such crappy batteries at that price range.
Only Apple.