Battery issue

[GoneFishingLTN]

I have two brand new interstate battery’s 6 months old. Well the last two days my four bank charger shows they are fully charge both times. But when I go out and fish for 5 hours with two carbons one on stand by 60 percent  of the day and running the min motor (150 4 stroke merc) it says warning battery low. 
 

now when I test them when home they read 12.3-12.4

after charge they read 13.4 give of take. What’s going on 

[BigAngus752]

6 minutes ago, GoneFishingLTN said:

now when I test them when home they read 12.3-12.4

after charge they read 13.4 give of take

 

I apologize but I'm having trouble picturing this.  You have two new batteries but a four bank charger?  Are your electronics running off of your trolling motor batteries?  Also, you said you are getting 13.4 after they charge, are you taking that reading while the charger is still plugged in and charging?  

 

The first thing that comes to mind is that you are running a 36V TM but only replaced two of the three TM batteries?  That could be your problem if that's the case.  

[GoneFishingLTN]

3 hours ago, BigAngus752 said:

 

I apologize but I'm having trouble picturing this.  You have two new batteries but a four bank charger?  Are your electronics running off of your trolling motor batteries?  Also, you said you are getting 13.4 after they charge, are you taking that reading while the charger is still plugged in and charging?  

 

The first thing that comes to mind is that you are running a 36V TM but only replaced two of the three TM batteries?  That could be your problem if that's the case.  

Sorry I explained poorly I have 4 battery’s but two to the motor and the electronics the two others are for the trolling motor. I’m running a 24volt 80lb fortex

[WRB]

2 deep cycle marine 12V batteries in series for the TM,1 cranking battery for OB engine and 1 deep cycle for the electronics? Are all the batteries the same size and type? or TM’s larger the cranking and house battery?

Tom

[newbiedmv]

A dumb comment but might be worth it. For some reason in 40 years I've never had any luck with interstate. 90% of the usage was in farm tractors (only ones I could get at the time).

They never seemed to hold a charge. The tractors were small 40-60 pto hp.

[Jig Man]

Your reading at 12.3 volts is probably correct.  They are about 50 % discharged and that is not good.  
 

You didn’t state the size of the batteries.  With today’s electronics you need really good strong batteries.

 

 I had lots of trouble keeping my cranking battery up running Lowrance HDS Gen 3 units.  I had to jump start if I stayed on a bank more than an hour.  They would completely kill the cranking battery in a year.  My solution was a Batteries + bulbs X2 1150 cca 225 rc agm cranking battery.

[MN Fisher]

17 minutes ago, newbiedmv said:

A dumb comment but might be worth it. For some reason in 40 years I've never had any luck with interstate. 90% of the usage was in farm tractors (only ones I could get at the time).

They never seemed to hold a charge. The tractors were small 40-60 pto hp.

Interstates are made by Johnson Controls - Walmart's and Autozone's home labels are also made by them.

 

Personally, I always try to stick with Penn East batteries - those would include Some Duracell, O'Reilly marine batteries, West Marine, Deka and MK.

 

Johnson may have the higher sales numbers - but for me that's because they fail more often, so more get sold for that reason.

[newbiedmv]

Explains why my Everlast batteries only last maybe 5 years in the tractors.

We had interstate batteries at work both reg and deep cycle. They had problems.

[TnRiver46]

13 minutes ago, newbiedmv said:

Explains why my Everlast batteries only last maybe 5 years in the tractors.

We had interstate batteries at work both reg and deep cycle. They had problems.

5 years is pretty good , especially for the cheapest battery on the market 

2 hours ago, Jig Man said:

Your reading at 12.3 volts is probably correct.  They are about 50 % discharged and that is not good.  
 

You didn’t state the size of the batteries.  With today’s electronics you need really good strong batteries.

 

 I had lots of trouble keeping my cranking battery up running Lowrance HDS Gen 3 units.  I had to jump start if I stayed on a bank more than an hour.  They would completely kill the cranking battery in a year.  My solution was a Batteries + bulbs X2 1150 cca 225 rc agm cranking battery.

I’m not sure but I’m thinkin my new console unit is somewhat draining to my electronics. My battery wAs old anyway but now it seems to have weakened after the upgrade. Thanks for the battery recommendation, I wrote down those cca and rc numbers for when I’m shopping. 
 

For now I just turn it off when I walk from the console to the trolling motor, don’t currently have a graph hooked up on the bow 

[Bankbeater]

Is the battery charger working correctly?

[BigAngus752]

20 hours ago, GoneFishingLTN said:

Sorry I explained poorly I have 4 battery’s but two to the motor and the electronics the two others are for the trolling motor. I’m running a 24volt 80lb fortex

 

Are the two batteries that are used as starting batteries and for the electronics hooked together?  Since you are saying that the Carbon's are running down both batteries, I am assuming that the batteries are hooked together.  Do you have them hooked in series or parallel?  If they are hooked in series you are sending 24 volts to your electronics and boat ignition but you are only getting the amp hours of one battery.  If you have them hooked in parallel you are sending 12 volts and should be getting double the amp hours.  They have to be connected differently than your TM batteries to work properly. 

 

 

[GoneFishingLTN]

On 10/20/2021 at 10:24 AM, WRB said:

2 deep cycle marine 12V batteries in series for the TM,1 cranking battery for OB engine and 1 deep cycle for the electronics? Are all the batteries the same size and type? or TM’s larger the cranking and house battery?

Tom

They are both cranking battery’s marine model 24m-xhd 

then for the trolling they are Duracell 12v

[MN Fisher]

49 minutes ago, GoneFishingLTN said:

They are both cranking battery’s marine model 24m-xhd 

then for the trolling they are Duracell 12v

24m is the group number. They have to be 12v for a marine system.

There should be other numbers - like CCA and Reserve Time - that's the info we need.

 

Yes, again the Duracells are going to be 12v - there should be some other numbers like Reserve Time or even ##AH as well as a Group number - 24, 27 and 31 are standard for marine batteries.

[GoneFishingLTN]

So I took my batteries to interstate here and they said both run at 900 and are good around 800 so the issue is that they are both cranking. They informed me I need one deep cycle and just one of the cranking batteries