m-LVD Low Voltage Disconnect. Senses low battery voltage and automatically disconnects devices to save power for starting or to preserve battery life. A dead battery is one of the most common reasons for a tow. Don't get stranded with a dead battery. The m-LVD senses low battery voltage and automatically disconnects non-essential devices to save power for starting or to preserve battery life. The m-LVD is ideal for any single battery boat or vehicle that wants to avoid getting stranded with a dead battery.. Status light in both m-LVD and Remote Control Switch provides visual warning of low voltage state prior to disconnect Alarm output available for audible warning of low voltage state prior to disconnect (optional alarm required) Remote Control Switch Functions:. Disconnect Voltage Adjustment - Sets desired disconnect voltage. Override - Temporarily delays circuit disconnect for 10 minutes. OFF - Temporarily disconnects circuits until voltage rises. Override or OFF - Silences alarm (o