[snovvman]

Originally Posted by Krayziepop

The heat shield he is describing is not one to protect YOU from the heat, it is meant to isolate the radio chipset from the battery compartment.

A cooler battery will discharge slower. ALSO, the battery has a protection circuit - once it hits a threshold temp it will not allow charging until it cools. 41*C or so I think.

Here is a post I made regarding the shield, which is described to be missing from "behind the keypad"...

High temps affecting battery performance is academic, but if the shield is behind the keypad, I don't see how it can keep the heat from transfering to the battery. Unless there is an air gap or ventilation, a shield can become a heat sink, which can AIDE in transfering heat from one side to the other.

In any event, when the electronics (lower) portion of the phone gets hot, the battery's temp does not go up significantly. I've run two phones with the covers off, along with various routines, and observed that the battery will mostly increase in temp due to high-drain (CPU, radio transmission, etc.), and not from conductive heat. I spent several hours with an infrared pyrometer measuring both the electronics portion and the batteries and found that the batteries stay relatively cool.