Ah yes, the dad battery bug. I've replaced all 3 of my batteries in the past month. They seemed to work fine in late July when I was out with the family chasing sand bass. Granted, it did seem like the trolling motor batteries lost more power than usual after only a couple of hours use. Worked several more times till about 3 weeks ago. Dropped the trolling motor in the water and nothing. Came home a tested them and only 4 volts on one and 10 on the other. I hook them up to my battery charger every time I get home from the lake and leave them on till the LED indicators turn green. Then I turn them back on the night before I go out and recheck them before hitching up the truck. So, I replaced those 2. This past Sunday I went to the lake, unstrapped the boat, backed it into the water and the engine would barely turn over. Trim worked but slow. The LEDs were showing green when I left the house but apparently a bad cell and couldn't handle a load. Anyway, replaced that one and all is good again. That was a group 24 battery and was about 6 yrs old, maybe even 7 so it was time. I replaced it with another group 24 STARTING BATTERY, not a starting/deep cycle. The combo ones don't have nearly the cranking amps (maybe 425-475) as a true starting battery (this one is 1,000). I do run my electronics and aerators off the starting batter though. Can't say they have ever caused my battery to drain where the engine wouldn't start but I can also see moving those to a trolling battery.