Found this tip on Facebook , Minn Kota recommends unplugging the trolling motor while charging the battery.

[BillDavidson]

Minn Kota Terrova Ipilot owners | Facebook

Uniting those that own, wish to own, or have owned the Minn Kota Terrova Ipilot. There are features that most don't know about, and together we can help...

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[George]

Interesting.