battery question

I’m shopping for trolling motor batteries. In their descriptions they have different group sizes, 24, 27, 30. Can someone explain what these mean or stand for or what the difference is.

The larger the number the larger the battery is, and the longer the run time will be. Go with the biggest battery that will fit.

Internal capacity of the battery. Bigger the #, the more juice it will hold. Get the biggest you can physically fit in your boat/trays.

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The larger the number the larger the battery is, and the longer the run time will be. Go with the biggest battery that will fit.

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X2

A 27 is considered a “starting” battery, good for bursts of power, over a shorter time and a group 29, is considered a good battery for consistent power over a longer period of time. Each has their place, if your getting one to run your troller, get the higher number. If your looking for a starting battery, get a 27

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A 27 is considered a “starting” battery, good for bursts of power, over a shorter time and a group 29, is considered a good battery for consistent power over a longer period of time. Each has their place, if your getting one to run your troller, get the higher number. If your looking for a starting battery, get a 27

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No.

Starting batteries are completely different than deep cycle batteries. The CCA is much higher and they are made to throw a burst of power to start the battery and then recharge fast.

A deep cycle is made with less CCA and is made to slowly discharge and then recharge slowly to get a full charge.

Using a deep cycle for a starting battery, no matter what the group is, is a sure fire way to ruin it.

Marine starting batteries are 24, 27, and 29 mostly. 27 is standard, but 24 will work for smaller and older motors just fine.

Marine deep cycles go from 24-32 usually. 24 is weak and should be used for pond jumpers with a small electric. 27 and 29 are standard trolling motor batteries found on most boats due to space restrictions. 30’s are upgrades and work great if you use a 12V motor and need longer running times.

Tell that to the InterState Battery rep that shared his battery application expertise with me. Try again…. I think he knows more than you

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Tell that to the InterState Battery rep that shared his battery application expertise with me. Try again…. I think he knows more than you

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An interstate 27 deep cycle has 600 CCA. That is not enough to start an EFI which needs 800+.

Your interstate rep was full of it.

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Tell that to the InterState Battery rep that shared his battery application expertise with me. Try again…. I think he knows more than you

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An interstate 27 deep cycle has 600 CCA. That is not enough to start an EFI which needs 800+.

Your interstate rep was full of it.

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A group 29 has 675…. and a city bus takes 1200 CCA… what the he77 is your point ? You have never heard of a Dual purpose battery down there ?? I think someone is full of something alright

My group 29 everstarts are 950cca they are deep cycle they also start my diesel 7.3 ford just fine

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My group 29 everstarts are 950cca they are deep cycle they also start my diesel 7.3 ford just fine

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Quote from B BK = “Using a deep cycle for a starting battery, no matter what the group is, is a sure fire way to ruin it. ”

Me too, I have been using a Group 27 Deep Cycle as my starter(as recommended by a battery rep) for going on 4 years now, but according to B BK, we are ruining something doing this ???

I just bought a Interstate 27 600cca. It does say deep cycle on the battery. This is the one the Interstate rep recommended for a cranking battery. I have a Merc 75hp should I be looking for something else??

If the battery is just to start your boat your good to go

Group 24 ,27, 29, 30 are the size designations for the physical size of the battery, each of these are made in deep cycle, dual purpose, stating batteries ect. you pick a case size, then pick witch type of battery you need ,then start looking at ratings CCA cold cranking amps,reserve amps,starting amps and what ever else they seem to rate them at, which is a set of paramiters somebody set to rate the battery. then figure out how many amps you need and pick a battery. what makes the battery types is a whole nother story! here’s a start on that!
http://evbatterymonitoring.com/BatteryBook2/Types_of_Lead-Acid_Batteries.htm
Stan

Deep cycle batteries are typically used for trolling motors where you can drain them 80% then recharge them…not what i would want if my main motor is hook up too.
Starter batteries have higher amps and should remain fully charge for long life out of them

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My group 29 everstarts are 950cca they are deep cycle they also start my diesel 7.3 ford just fine

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Quote from B BK = “Using a deep cycle for a starting battery, no matter what the group is, is a sure fire way to ruin it. ”

Me too, I have been using a Group 27 Deep Cycle as my starter(as recommended by a battery rep) for going on 4 years now, but according to B BK, we are ruining something doing this ???

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Big G what are you talking about? Deep cycle or dual purpose? Two totally different batteries.

You aren’t going to ruin “something” you are going to ruin the battery, UNLESS it is a dual purpose. Deep cycle were not meant to drain 25% of its battery charge at once and then quickly recharge with the alternator. They can’t take that stress over long periods of time. Dual purpose can, they are made to do it.

I told you that you should not use a deep cycle for starting, and you said you can (talking dual purpose I guess???).

If you were talking dual purpose then yeah, it would work for both just fine.. that is why they call them DUAL PURPOSE. If you are talking deep cycle, you are incorrect.

The interstates are dual purpose, but are lacking in CCA from what a true starting battery is. It may or may not have the CCA needed to start your motor depending on what your motor needs CCA wise. The big EFIS need at least 800 CCA and the dual purposes likely would not start one up. That is why they come with STARTING BATTERIES in them.

Deep Cycle

Dual Purpose

Starting

Three different batteries.

Big G you are using an interstate dual purpose, not a deep cycle. It may say deep cycle on it, but if you look at their website it is dual purpose. So don’t tell me you are using a deep cycle because you are NOT.

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I just bought a Interstate 27 600cca. It does say deep cycle on the battery. This is the one the Interstate rep recommended for a cranking battery. I have a Merc 75hp should I be looking for something else??

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If it starts it, you are fine. No clue what your 75 merc needs for CCA. Your battery is a dual purpose, so it has the guts to be used as a starting unlike a true deep cycle.

A group 27 starting should have around 800-900 CCA.

A group 27 deep cycle should have around 500 CCA.

A group 27 dual purpose should have around 600-800 CCA.

Oh, the battery dilemma.

Just don’t do what my inlaw does, he goes and gets a car battery from the junk yard and wonders why the motor wont turn over even after a full night trickle charge.
He’s says I just bought it last year and I saved a lot of mulla.
I had to put my battery in his boat to prove to him his was dead, gone, by,by. Stubborn old bird but a great guy.

Hey just saw a quote on TV that fits perfectly in this topic.

“the salesman is the last person you want to get your information from”

Talk to a motor mechanic or motor dealer about what battery would be best with your motor, not the person trying to sell you the battery.

This is my Everstart deep cycle only. works great for starting and trolling motor these start a 225 yamaha my diesel pickup and run trolling motor all day. Just checked 850cca my bad not 950

It is simple go with as big of battery that fits, deep cycle for trolling motor and dual purpose for start. On a side note I got five years out of my size 31 dual purpose( dual porpose because that is the only way a group 31 comes in) fleet farm batteries and I use my boat a lot.

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Hey just saw a quote on TV that fits perfectly in this topic.

“the salesman is the last person you want to get your information from”

Talk to a motor mechanic or motor dealer about what battery would be best with your motor, not the person trying to sell you the battery.

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Ah hemmmm… I am a Service Manager with 12 Mechanics working for me… and we have an InterState truck, with a “salesman” who stops every other week. Believe me, he would not think of steering me wrong…. I “sell” his batteries everyday, for him. Here is a quote for ya… “don’t get your battery advice from some dude from Iowa on the internet”….

hopefully not one of the iowegians that like to anchor up by the dam on pool 4 while everyone is trying to drift. They never seem to be wrong either?

Wow… what a stupid arguement. B bk is right. Hes not saying that a deep cycle absolutly wont start a motor. Just saying that thats not what its ment for. I seen a small car towing a smaller bass boat. Is that what its ment to tow? No. Will it, yes. Is it probably bad for it over time… yes. I have swapped a deep cycle from my trolling motor many times to start a dead battery. All hes sayin is that thats not what they are ment for. And your interstate guy is an idiot…

I just realized something.

The people posting in this thread must be the only people not on Pool 4 fishing today.

I sold Interstate batteries for over 20 years and quit selling them about 5 years ago. I quit because I had 5 socalled battery experts on their route truck in 1 year.They made more screw ups than I could take and told them pack up the batteries and don’t come back. Their boss/owner dealer never even called to ask why I dropped their product. The batteries were fine. Always felt they were a good product. But don’t tell me that all their route guys are experts. Like was said above there are dual use batteries, deep cycle only batteries, and starting batteries in an aray of wet flooded, AGM, Gel, spiral wound. 6 pak, etc. Group size s are 24, 27, 29, 30/31. These numbers only pertain to size not CCA, reserve, etc.

Get the largest marine rated dual purpose starting/deep cycle AGM batteries, hook them up to an AGM rated charger/conditioner/maintainer and live happily ever after.

Sometimes the easy way out is to post a question on the internet. Posting a question on the internet MAY get you answers. What it WILL get you is opinions. If you want answers, good answers, look it up. There is a wealth of battery info out there PROVIDED by the manufacturers to help you understand and choose the best product to fit your needs.

Blaine fleet farm Duration AGM Blue Marine deep cycle/starting battery group 31. This battery meets Mercury’s requirement for their top of the line Verados, digital shift and throttle, electric power steering, efi. Per their manual 800 cold cranking amps minimum and they specify an AGM. And it’s a deep cycle. Put a proper charger on it and it will be the last battery you will ever need till the next one…guaranteed.