While adding water temp to the screen overlay on my Lowrance Elite 5 I found some other items available that included the system voltage Now I have a digital readout for my battery voltage to keep an eye on instead of the 4 green lights on my trolling motor. Since I'm using one battery for everything this is a critical measurement for when I need to quit using the TM and still be able to crank the 90HP engine. I have watched the voltage drop to 11 with the 55lb TM on high and it will come back up to over 12 with it off. I let the no load voltage get to 11.9 the other day with no problem, but I'm thinking the full load voltage is a better indicator of how much juice is left in the battery. What do you think?