Mine was indoors in air conditioning. I’m hoping we get a beta update tomorrow and that it gives it full compatibility. I guess from reading reviews that iOS 15 beta recognizes it as a generic UPS where 14.7 recognizes it as a MagSafe battery pack. I’m wondering if that comparability unlocks more efficient quicker charging.Seems okay in my use (its slow but works)
I did see one review that mentioned if weather is very hot, may effect how much fast if can charge (not sure if that's the case)
iOS 15 beta 3 doesn't have support for it yet. The next beta probably will.