Don't you hate coming back to the vehicle after forgetting to turn the head or interior lights off to discover a dead battery? This Power Protector solves the stress and headache of a dead battery! The Braille Power Protector monitors battery voltage and usage with the vehicle running and when it is turned off. If it senses that the usage of the battery when the vehicle is turned off will exceed the amount of power needed to start the vehicle, the Braille Power Protector will disconnect the battery and protect it from being drained. This saves you from being stranded and wasted time due to a dead battery. It also avoids towing costs and extends the life of the battery.