https://wccftech.com/first-iphone-13-teardown-small-taptic-engine-bigger-battery-more/

This initial iPhone 13 teardown might not provide a copious amount of detail on how to get access to the innards, but it does show what Apple has changed. If you thought there were not any significant design changes on the outside, wait till you see what is on the inside.

The models in the images below appear to be the iPhone 13 and iPhone 13 mini. Unfortunately, Sonny Dickson did not provide any description when he posted the photos on Twitter. According to what we can tell, the Taptic Engine has seen a significant size reduction, which is what compelled Apple to incorporate a bigger battery on all four models this year.