Mouse Oil and Modest Mouse Float On - putting a fan in a computer mouse and using a buck boost or batteries to boost voltage to 12 volt plus car starter backup 9volt.
MouseLube mouse oil is a mineral for computer mice on plastic mouse pads the oil helps slide mice around.
Air hockey mouse idea - put a fan in mouse. the fan needs to be lightened by drilling holes or removing case. USB is only 5v and fan needs 9 or 12v. which is lighter 4 button batteries or a buck boost board. The battery option is mist feasible but usb power is convienient.
Using a low votage car battery and 9 volt battery in series with diodes and resistor would 20v damage electronicsr? I want a latch mechanism that will bypass battery when car is on to reset consumer has to open hood and click backup battery in. This idea might work it is untested I dont hav a car or low battery. Mythbusters should test it.