Regarding the issues involving the Apple 6s phone .......
Early Apple 6s phones had some significant problems with the batteries that eventually resulted in a
recall. The problem was that the phone would suddenly power down (turn off) even though there was sufficient battery charge remaining. Also, there was an issue with the battery charge lasting only several hours in some cases. During that period I had an Apple 6s that exhibited both of those problems. I was lucky to live close to an Apple Store and was able to get the problem addressed (battery replaced) at no charge. For folks who were not close to an Apple store, the phone had to be shipped to an Apple Service Center .... therefor being without a phone for 3-4 weeks. Tom may have purchased the case charger in an attempt to circumvent the 6s battery problem.
My points are:
1. If Tom's phone inadvertently powered down while a charger was connected at home, it would not log a "charger disconnect" event.
2. If Tom's phone died due to "low battery" at 12:23 am it may have been due to a battery defect, which may indicate that the case charger was not attached at that time.
Apple no longer has information on their support site regarding the 6s recall because the recall has long expired. However, I was able to find some information. SEE ATTACHED.
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