Toyota Prius Voltage Stabilizer by NRG Innovation I'm wondering if its plug n play, also if its effective. Thanks
doesn't do too much if anything. had these installed in a few cars, they are pretty much just under the hood bling. same thing with ground wire kits. They work better with older cars.
From what I can figure, it's a battery stiffener like a cap for a high current stereo system. It stores and then releases voltage when system demand is higher