I don't use a toggle on my system and so far I don't see a need to. I have a small 35AH AGM battery up front that I use for both my Echomap Ultra 122 unit and the Livescope black box and transducer. The system draws very little current when turned off. I've checked my voltage for this system even after 3 weeks of not using Livescope and seen a minimum drop in voltage, in the 0.2 volts range at the most after 3 weeks.