/sci/ - Science & Math

I use my phone a lot at home but it frequently gets as hot as 30°C. I damaged my previous phone battery when the phone become 35°C hot for just a few minutes.

To cool down the phone I stop using it for a few minutes and place it on a table surface or something with the screen off. But is there a better method to cool down a overhot smartphone or laptop without placing it in a fridge or placing it outside for a short time?

I once placed it on top of a large sheet of aluminum casing from my old computer and it cooled down real fast. What's the best metal surface for chilling hot objects placed on it?