A laptop cooling stand is a nice investment to keep your device cool while working. It is really useful when using any heavy application or playing a video game on your laptop. The fans in the stand–usually there are two to three of them–help cool the chassis by sending the air upward from down below. A laptop cooling stand comes with a USB-charging cable which, in our option, should be plugged into an external power supply and not to the laptop, if you can manage that, as it helps save the battery.

Source: https://www.gadgetsnow.com/slideshows/heat-wave-11-tips-to-keep-your-gadgets-cool-and-safe/photolist/91267935.cms