I want to power a computer fan from a 12v motorcycle battery.
Disregarding the motorcycle battery being 12.6 volts (not charging), lets say that it's a regulated constant voltage source of 12 volts.
The fan needs to be 12v driven where 0.58 Amps will be drawn. It is a very old fan, and I can't find a datasheet. But it is exactly this one: https://www.ebay.com/c/1472102822
Ohms law says that a 24 ohm resistor is good for 0.5 Amps or current. However, Ohms law also says that the power being drawn will be 6 Watts. Most resistors do not have this high of a power rating.
How do I power my computer fan the right way without getting a high wattage? I am not looking forward to using bulky, high wattage resistors.