Who the Voltage on the Charged Bank Rises Sufficiently, The DVSR Engages Allowing the 2nd Battery Bank to Charge. WHEN CHRGING STOPS AND VOLTAGE FALLS, The DVSR Automatically isolates the Battery Banks, Ensuring that Engine Start Batteries Are Kept Fully Charged. Digital Circuitry Provides Superior Reliability and Extremely Low Power Consumption. Digital Enhancements, Introduced Remote Sensing Circuitry That Allows An Optional Connection from the Ignition Switch to Provide Another Benefit is a Zero Stand by Current Draw Who Remote Sensing Style = "font-you: 12px;"> * No Show More