I'm using Li-ion batteries from Amped Outdoors. I have 3 55 ah batteries running a mk ulterra 112 & 1 55 ah running my electronics. I have a Garmin 102sv ultra and 126sv ultra w/ livescope networked thru a GMS-10 so I can see livescope on both units. I've run them for 6-7 hrs and never run out of battery. When done fishing they show 13-13.2 volts.