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re: Minn Kota Ulterra - Losing Battery Quickly

Posted on 5/4/21 at 10:13 am to
Posted by dawg23
Baton Rouge, La
Member since Jul 2011
5065 posts
Posted on 5/4/21 at 10:13 am to
Are you disconnecting power to the trolling motor after each trip ?

My old Minn Kota (24v, 80 lb. no spot lock) would draw power any time the unit was plugged into the power receptacle on the bow. Even when the unit itself was turned off.

I called Minn Kota and was told that this is common on that series of trolling motor. I was advised to unplug the trolling motor after each trip, and plug it back in the next time I launched.

FWIW my batteries were wired directly to a large round socket style outlet on the bow. The trolling motor had a matching male plug.
Posted by Spookz
Baton Rouge
Member since Oct 2016
128 posts
Posted on 5/4/21 at 10:05 pm to
This is interesting. I would guess just powering it down via the power button would accomplish the same thing as unplugging... will try this if the batteries check out. Thanks!


Follow up question... after a little research on deep cycle marine batteries; does anyone prefer wet cell to AGM? I currently have AGM.

In my limited knowledge I always viewed AGM as better than wet cell and below lithium.

One other note is I am wondering if it is possible I am overcharging the battery? I typically leave them plugged in/charging the night before I take off for a weekend fishing. I always assumed the 2 bank charger would regulate this once a full charge is read/done. I read something about this in my search and had never heard of such a thing.
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