As a gift, I received a Mophie Juice Pack Helium
After reading the manual and affirming it was at full charge, I tested it. AFAIK, it worked as designed (sorta). Charging my iPhone occurred as expected. But what was a surprise, is how hot the Mophie got.
About 45 minutes in to the test, I noticed that the Mophie was very warm. (Lacking a thermalcouple or such, I term it as “uncomfortably warm”.) Ergo, I promptly quit the charging and shut down my phone. Even after removing the Mophie, the back of my phone was warm, very warm.
I checked for discoloration & bulging, but there was none. And all seems normal with no ill effects. But should there be latent battery or iOS issues, I no knot.
I called Mophie Tech Support and they advised that heat is a common by-product & residual effect of the charging process, but would gladly exchange my device (at no cost) for a new one. And so they did.
The new Mophie works the same, but as I was far more attentive, I did not allow it get as hot as before.
I would use the Mophie in an emergency, but until I can better monitor the temperature, I remain gun shy and the Mophie awaits regifting.
Wadda think? Is this thermal thingy
typical of all juice packs? Am I being prudent or paranoid?