User's Manual

86
If your device is used for long periods, its surface can become very warm. While
the temperature may not feel hot to the touch, if you maintain physical contact
with the device for a long time, for example if you rest the device on your
lap, your skin might suffer a low-heat injury.
If your device is on your lap and gets uncomfortably warm, remove it from your
lap and place it on a stable work surface.
Never place your device or AC adapter on furniture or any other surface that
might be marred by exposure to heat since the base of your device and the
surface of the AC adaptor may increase in temperature during normal use.