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Are you sure though? I have one and whenever I charge both, using the pack as a wireless charger, things get piping hot. The same btw if you connect a full pack to a nearly dead phone…

Imagine what will happen with even poorer heat dissipation when stacking multiple of these…
hadn’t thought about that—will be interesting to see if Apple has anything particular up their sleeve for heat dissipation (yeah you can’t beat physics, but…wishful thinking I guess)
 
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