There have been scattered reports of exploding Iphone 7s
Google it.
Don't have to Google it. There have been ZERO "exploding" iPhone 7s, but there have been some that have either overheated or caught fire, in line with the normal failure rate of Lithium Ion batteries of 1 in 10,000,000. Since Apple has sold over 150,000,000 iPhone 7s since they were introduced, the expected number that would have caught fire would be approximately 15 or so. That is what you will find in a Google search is the reports of those 15. . . Certainly not the 1 in ~2500 failure rate the Samsung Galaxy Note 7 was experiencing due to poor manufacturing processes and tolerances inside their case for battery expansion during fast charging.