Thread: Battery Charging question.

I'm told, but have no experience with it, that a boat bouncing around in rough water can damage a battery.

With my charger no matter how charged the battery is every time you disconnect the charger from house current it will tell you it is charging the battery from below the 80 percent state. You would expect the opposite problem because of what they call surface charge where a bad battery will give you higher voltage immediately after disconnecting it from the charger than it can actually maintain. Checking the charge of a battery by voltage is not very accurate because it is a chemical process. I'm fairly suspicious of all of the new fancy chargers. There are so many things to consider such as the ambient air temperature the temperature of the battery itself, how recently it was used, and a bunch of other consideration that a truly automatic process that would maximize battery life would be difficult to achieve. I understand that there are newer battery chargers that take into account ambient air temperature and allow the user to customize the charging regimen. It all sounds like a lot of bother to me. When I was young and poor I float tested my batteries regularly and manually controlled the charging regimen. Now I just replace them.

One thing I think you should do if the battery charger is giving you weird behavior is put a load on the batteries and then recharge them. That way the various problems with measuring charge by voltage is going to be more less of a problem because you will know you are actually charging a drained battery.

Originally Posted by "G"

Are the wires on that bank clean and in good shape where they connect with the ring connector ? Are the ring connectors good and clean....are any of the wire stands broken where they connect with the ring connectors ?

All is just like it came out of the box in June of 2018.

It’s doing exactly what my last one did..
I’m so freakin aggravated.... which don’t do any good... LOL
I’m aggravated at myself because I didn’t buy it locally and if I would have I could more than likely get it swapped out and have it back going tomorrow...

Bad thing is I’m about ready to say to heck with minnkota between these chargers and a 2400.00 trolling motor issue they wouldn’t warranty.... bad thing is I’m not sure if there’s anything better! LOL



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Originally Posted by Dee F

I swapped banks. It’s definitely the #2 bank.
Bad thing is I’m leaving Monday headed to Guntersville.... there’s no way o can ship it to them and them have me one back before then.
I emailed minnkota and I’ll call them tomorrow.



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Dee, if they can’t help you out quickly one thing you can do is move cranking lead over to trolling battery. Say you come in from fishing, plug charger in give it a hour and cranking should be topped back off then move it over to the trolling battery that I not getting charged should top it off before morning. A pain but it’s a work around to keep you fishing.

Leave a day early and got to Eufaula to Johnson outdoors headquarters. It’s about 3-4 hours from the big G.


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Originally Posted by Thunder

Leave a day early and got to Eufaula to Johnson outdoors headquarters. It’s about 3-4 hours from the big G.


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That's a good idea.


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Are all batteries the same ? Have they(each) been set to a specific battery type ? Precision charger will do them all but could have lost setting .

Yeah. They’re the same. It’s broke. I checked all the voltage on each bank and the #2 bank ain’t putting out....and minnkota couldn’t help with any kind of speedy service.. but they could sell me a new one and ship it next day!!

I have installed a new one and I’m ready to go now.

I’ll send them this one to replace and have 2 I guess!!



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Thanks for keeping us up to date. I find batteries interesting for some reason maybe because they seem like something from another age almost. It's kind of like concrete which despite billions in research isn't much better than what the Romans used. You would think in the age of tiny computers you carry in your pocket that other technology would develop a little faster. Why are we still using lead acid batteries and have smart chargers that are pretty dumb and apparently unreliable.