PulseTech is the original manufacturer of the patented ReNew It technology used to desulfate lead acid batteries.  To answer your first question: It is not snake oil and truly works!  The frequency at which the onboard desulfators and chargers use will gently breakdown and remove hard crystallized sulfur deposits built up on the lead plates allowing the battery to receive a full charge and provide optimum power output once again.  Not only will these units restore old run-down lead acid batteries they will prevent the effects of sulfation for years to come saving you money. Lab and field tests by individuals, companies and government agencies around the world have proven that this Pulse Technology works. It is time to stop the number one killer of batteries—sulfation—and buy a PulseTech Charger today!