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Posting a reply to: Re: Cold weather battery storrage

Muskie Fishing -> Muskie Boats and Motors

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North of 8

Posted 11/18/2022 12:27 PM (#1014732 - in reply to #1014731)
Subject: Re: Cold weather battery storrage

Rudedog - 11/18/2022 11:21 AM

North of 8 - 11/17/2022 3:54 PM

I did find a graph that show expected life of deep cycle lead acid batteries. They state that on average they last 4 to 8 years, but life is dependent on depth of discharge prior to charge.
For example, battery that has a depth of discharge of 100%, it will only have recharge life of <150. Same battery that has a depth of discharge of 50% will have recharge life of between 350 and 450 times. Less depth of discharge, greater the number of charges it will accept.

Frustrating. ...... There is so much differing info out about battery care.
This above is exactly opposite of what I have read and heard from "Battery Guy".
I have been advised many times to not charge after every little use, run it down a ways and charge then. However, I never run down close to 100%. I also Do not leave sit un-charged, but don't charge after a few hours use. So I go out fishing morning and evening, then I charge overnight.
Maybe I should charge midday and overnight, exactly as I was advised Not to do.
Guess its worth a try.

I understand your frustration, I have also seen conflicting advice. I typically plug in the charger after every outing, regardless of length. But not really doing that based on solid, scientific data.
I did have one thought, is there any chance your trolling motor batteries are experiencing too much vibration? I have read vibration is the biggest killer of batteries. In addition to hold downs, I cut a couple pieces of the rubber mesh designed to hold throw rugs in place and put under mine on the "it can't hurt theory" to dampen vibration.