electric supercharger? how would it produce enough boost?
actually read about a proper one. you need 3-4 extra 12v batteries to get the power to a motor. the motors need servicing regularly and your forever turning it off to charge the batteries.
that one only draws 3 amps? they should get a better motor and draw about 30+ amps and then u might be talking power.
my mate bought one of these , then sent it straight back with a shitty letter
it was a pile of rubbish and was good for nothing " if its too good to be true ,it probably is"
remember this in life and you wont go far wrong