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Costco battery?

swimmer_spe
Explorer
Explorer
My TT needs a new battery. I am not normally boon docking it, yet, so I only need a battery for the typical load of it sitting unplugged from shore power. So, which Costco battery should I get?

Do not suggest other places as I am in Canada, and don't have Autozones, Pepboys, etc...

Do not suggest the 2 6 volt set up as that is not my need.
55 REPLIES 55

joegray
Explorer II
Explorer II
My God . Five pages for a 12 volt battery. Go buy one with screw terminals and be done with it. This isnโ€™t Rocket Science. All your Capital letters are rather RUDE. People are only trying to help

neil57
Explorer
Explorer
Best battery for the money if it fits is a group31 truck battery, go to local truck shop,eg navistar and buy for less than $100. It will have threaded post for your cables to attach to just like a marine batt. I used these in a highway truck for years to power inverter and 12v heater all night, they last 4 years doing that every day. Sudbury has lots of truck dealers.
2009 2500HD Sierra CC DA
2014 Crossroads Cruiser 35ss

swimmer_spe
Explorer
Explorer
MEXICOWANDERER wrote:
10-3/4 inches long GROUP 24

12" inches long GROUP 27

13" inches long GROUP 31, 30, 29

Measured by the jar, not rope handles, fratches, ledges, etc.

Gotta ruler or tape measure?

Or mark STRING and stuff it in s pocket and take it with you...


This helps me the most. I can get a battery that will fit, but wouldn't be one of those. Now I know which ones to look for.

MEXICOWANDERER
Explorer
Explorer
10-3/4 inches long GROUP 24

12" inches long GROUP 27

13" inches long GROUP 31, 30, 29

Measured by the jar, not rope handles, fratches, ledges, etc.

Gotta ruler or tape measure?

Or mark STRING and stuff it in s pocket and take it with you...

2oldman
Explorer II
Explorer II
I wasn't asking you the size of your battery. I was suggesting how to quote one sentence from someone without quoting his entire half-page reply.
"If I'm wearing long pants, I'm too far north" - 2oldman

red31
Explorer
Explorer
swimmer_spe wrote:

I

D
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T

K
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Find out, we can't.

What size pants show I buy ? :B

swimmer_spe
Explorer
Explorer
2oldman wrote:
yikes Do it like this:
maillemaker wrote:
You still have not answered the question: What size is your current battery.


.....
I

D
O
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T

K
N
O
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Seriously, there are a few reasons why I am not just swapping batteries.

The 3 I have are junk.
One is completely junk, where as the others are on their way out.
I have used all 3 at one time or another for my TT. They all had moderate success. I know one is a marine battery, another is a marine starting battery. Not sure of the 3rd.

azrving
Explorer
Explorer

2oldman
Explorer II
Explorer II
yikes Do it like this:
maillemaker wrote:
You still have not answered the question: What size is your current battery.
"If I'm wearing long pants, I'm too far north" - 2oldman

swimmer_spe
Explorer
Explorer
maillemaker wrote:
So, i went to check Costco. They only have 14 and 15 code batteries.

Will those work? If not, off to Canadian Tire or Walmart.


You still have not answered the question: What size is your current battery.

As I said before, you want a Marine battery that is the size of your current battery. You may find that your battery box is bigger than your current battery and may accept a larger battery. If so, you might consider installing a bigger battery that will be able to store more energy.

But at a minimum, buy the current size you have. If in doubt, use a tape measure and measure the size of your current battery and compare it to the new one.

There are 3 basic kinds of wet (lead-acid) batteries:

* Cranking batteries ("car batteries")
* Marine batteries
* Deep Cycle batteries.

The difference between them is that cranking batteries are designed to provide a lot of current over a short amount of time, whereas a deep cycle battery is designed to provide less current over a longer period of time.

Typically cranking batteries have "sponge" lead plates that have more exposed surface area and can thus dump a lot of power quickly, as a starter motor needs.

Deep cycle batteries have solid lead plates and cannot usually provide as much current but tolerate deep discharges and more discharge/recharge cycles than a cranking battery.

Marine batteries are usually in-between, with a compromise of performance of the two.

For an RV, what you really want is a deep cycle battery.

But most big box stores don't carry them. They typically carry cranking batteries and marine batteries.

So if you are just going to run down to your local big-box store and buy a battery, buy the biggest Marine battery that will fit in your battery box. It will probably last you 5 years without you monkeying with it. Maybe longer if you know how to add distilled water to it.

Here are your Costco choices. Which one you choose depends on which one matches the size of what you already have, or whatever will fit in your battery box:




... I don't know.

I have 3, and over the last few years, it has got mixed into the others that I own. One of them is dead. The other 2 will eventually need to be replaced. I am trying to figure out what I should go with.

maillemaker
Explorer
Explorer
So, i went to check Costco. They only have 14 and 15 code batteries.

Will those work? If not, off to Canadian Tire or Walmart.


You still have not answered the question: What size is your current battery.

As I said before, you want a Marine battery that is the size of your current battery. You may find that your battery box is bigger than your current battery and may accept a larger battery. If so, you might consider installing a bigger battery that will be able to store more energy.

But at a minimum, buy the current size you have. If in doubt, use a tape measure and measure the size of your current battery and compare it to the new one.

There are 3 basic kinds of wet (lead-acid) batteries:

* Cranking batteries ("car batteries")
* Marine batteries
* Deep Cycle batteries.

The difference between them is that cranking batteries are designed to provide a lot of current over a short amount of time, whereas a deep cycle battery is designed to provide less current over a longer period of time.

Typically cranking batteries have "sponge" lead plates that have more exposed surface area and can thus dump a lot of power quickly, as a starter motor needs.

Deep cycle batteries have solid lead plates and cannot usually provide as much current but tolerate deep discharges and more discharge/recharge cycles than a cranking battery.

Marine batteries are usually in-between, with a compromise of performance of the two.

For an RV, what you really want is a deep cycle battery.

But most big box stores don't carry them. They typically carry cranking batteries and marine batteries.

So if you are just going to run down to your local big-box store and buy a battery, buy the biggest Marine battery that will fit in your battery box. It will probably last you 5 years without you monkeying with it. Maybe longer if you know how to add distilled water to it.

Here are your Costco choices. Which one you choose depends on which one matches the size of what you already have, or whatever will fit in your battery box:


1990 Winnebago Warrior. "She may not look like much but she's got it where it counts!"

red31
Explorer
Explorer
code 14 is a 27DC

theoldwizard1
Explorer
Explorer
Get the largest battery that will fit in your box. Don't waste your money on a "marine" battery.

FLY_4_FUN
Explorer
Explorer
I use the Marine/rv group 24 in a cargo trailer and am happy with it. For an rv I would for sure try for the larger group 27 batt they sell for a few dollars more.
2012 Dodge Ram 3500 crew SB 4x4 CTD 3.73
2015 Brookstone 315RL
2009 Colorado 29BHS (sold 2015)
05 Jayflight 29BHS (sold 2008)
99 Jayco Eagle 12SO (sold 2005)

BFL13
Explorer II
Explorer II
swimmer_spe wrote:
So, i went to check Costco. They only have 14 and 15 code batteries.

Will those work? If not, off to Canadian Tire or Walmart.


Yes. This one is their "15" EG.

https://www.costco.ca/Automotive%2c-Marine%2c-Lawn-%2526-Garden%2c-and-Golf-Cart-Batteries.product.1...

EDIT--link didn't work right. they don't ship flooded batts. Anyway yes, you want their Kirkland Marine/RV flooded in 24 or 27 size.
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