JM.
Well-Known Member
To add to this, if you want to know the exact tech, google "Peltier junction." It's a solid state heat pump made from two different semiconductor materials. One side gets hot, one side gets cold. They are insanely inefficient but in this scale, that's irrelevant. But the fridges made with them are awful. They can also only cool to a relative temperature from ambient, unlike a compressor cooling system which always reaches freezing (approximately). All of this is just fine for this application (and other small applications, not large ones). This is why the charger consumes 27w while only putting 15w into the phone.
If you reverse the polarity, you reverse the cooling. So you could heat your phone and cool your car, LOL!
If you reverse the polarity, you reverse the cooling. So you could heat your phone and cool your car, LOL!
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