I'm not trying to create a controversy, so no cynical replies please. I'm just looking for some informed opinion on this. Please don't reply if you're just wildly speculating. From Apple's batteries page: "If you use your iPod, iPhone, iPad, or notebook in temperatures higher than 95° F (or 35° C), you may permanently damage your batterys capacity. That is, your battery wont power your device as long on any given charge. You may damage it even more if you charge the device in these temperatures. Even storing a battery in a hot environment can damage it irreversibly." http://www.apple.com/batteries/ There have been posts here suggesting wrapping the iPad in a towel and letting it run for 24 hours at max brightness to cure yellow tint problems and things like that. I haven't done this specifically, but for example, I used mine at 100% brightness for a couple hours while the iPad was lying on a bed, only to then notice that back got quite hot because the bed was acting as an insulator. When held in my hands, the iPad did not get as warm. No, I don't usually use it at anywhere near 100%, and I had just done it on impulse to test out the new display. People might also experience the same effect using a soft case that covers the back. Back to my question, I can't find anywhere on the net that tells you specifically what temperature a lithium polymer battery can safely reach before any irreversible damage, however small, might start to occur. The temperatures Apple gives are only ambient temperatures to operate the iPad in, but as I said above, even if your room is within that temperature range, wrapping iPad in a towel, or using it placed on a couch or pillow, or in a case, can create an environment for the iPad that is actually hotter than that. I'm not worried about burning my hands, but I just want a better idea for if / when I should be worried that my iPad's battery is not enjoying itself in there. I would like to think that the battery would have a high tolerance, but this doesn't seem to be the case when Apple lists a max storage temperature of 113... Any info from engineers or links to somewhere on the web to educate me on this would be great.