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re: Trolling Motor Batteries

Posted on 10/26/15 at 4:13 pm to
Posted by NattyLite
St. Charles Community
Member since Jan 2010
2026 posts
Posted on 10/26/15 at 4:13 pm to
I was told that if you should leave your onboard charger plugged in always when you are not on the water to prolong battery life. Is this true?
Posted by WHODAT514
Walker, La
Member since Mar 2012
1873 posts
Posted on 10/26/15 at 4:26 pm to
I had 3 exides in my xpress that lasted 3 and half years and I didn't leave them plugged in like I should have. I replaced them with everstart wally world and they worked great.

on my new boat I have 4 batteries from 2012 and they are just fine. I have an onboard I leave plugged in and I also have a perko switch that kills all the power to the boat from all 4 batteries.

if I had to replace them and I will eventually ill go with 4 evertstarts from wally world. they will take back anything. and they aren't bad priced batteries. exides aren't bad either from academy.
Posted by DeoreDX
Member since Oct 2010
4063 posts
Posted on 10/26/15 at 4:47 pm to
quote:

I was told that if you should leave your onboard charger plugged in always when you are not on the water to prolong battery life. Is this true?


Yes. As a lead acid battery live longest if it remains charged. As the battery charge level lowers the cells begin to sulfate. Prolonged time at low charge levels and sulfation gets to a level that the battery will no longer charge. Also charging them slowly and keeping the heat down as they charge will also help with the life of the cells. Buy a float charger and keep them plugged in when you aren't using them for maximum life.
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