This 12 Volt fan is used for cooling items like 3D printers.
This is a 5 to 12 volt circular brushless fan @ 60mA measuring 54 mm from center mounting hole to mounting hole, comes with 3 pin JST connector.
Also known as the Magic Plate, this cooler uses Peltier effect that can generate electricity! Essentially when you apply power to one side, it will heat up and the other side will cool down. If you create a differential system you could essentially generate electricity but not enough to charge your phone…
This Heat Sink Cooler Kit For Cooling your Raspberry Pi includes 4 aluminum heat sinks with adhesive backing.
This device is a 30 x 10mm 5V Brushless Cooling Fan with 10 cm. wire