@sdharris
Do you use a sunshield with your iPad mini4? Do you put it in airplane mode and apply the typical suggestions to minimize overheat? I recall your home location doesn't have high temperatures, correct?
I'm not able to test my iPad mini4 cellular until Sunday when I'll be in a tropical climate [emoji16]
I have the DJI sun shield but never used it, I tend to stand under a tree / find some shade. I left everything running on my test, which is unusual as I would normally turn wifi off as I found it hunting for signals disrupt the lightbridge connection. Instead I stood there today listing to pings of email arriving in the inbox. I was considering using the BBC iPayer in that clever little media screen you can use now on iOS 9.
Certainly a cool september day here now. We probably need you in a car with A/C for two batteries, then step out in the tropical climate (I am jealous) for two batteries and see how it performs.