no, no... not the safety terminal on the (+) endo of the battery... it is a device, aftermarket, that installs onto the battery (don't remember, (+) or (-)) and it will cut off the battery completely if the charge level drops below a specified threshhold. the device is connected to the battery, and somehow "gates" the juice flow, and when there is a legitimate demand for the power, such as lights come on, or the modules are awaken, it opens up the full battery potential...

i can't remember the name of the widget, or any other keywords, but it was kind of a smart cut off switch...