I have an Apollo brand 12 Volt Cooler/Warmer, designed to plug in to my car's 12 V cigarette lighter.
I am wondering if the power this device uses will significantly affect my car's performance or gas mileage. I have a 2010 VW Jetta 2.5 liter gasoline car.
The transformer for the 100-240 V AC connection (another option for running the device) says it is designed to output 4 A at 12 V DC. Since
power = current x voltage, the transformer will output 48 W of power.
The transformer also says that it takes 60 W of power for the input.