Batteries...Is It All About CCA's?

Hi,

My "Toyota" branded battery is 2+ years old and only showing 600 cca out of the 800 it's rated.

Meanwhile I replaced batteries on my RV and the old ones surprisingly test out fine with 12.7v and 810 cca. These are 4 year of Deka AGMs. oddly abused to no end being down to around 10.4 volts most of the time but had them on a CTEK charger that seems to have rejuvenated them. They've been holding a 12.7v charge and test as brand new under load!

Can I use these in my Tundra?

 

If they'll fit, you can use them. But I believe there is something you need to add when using an AGM battery in the Tundra. Someone else can chime in.

 

There are several threads about AGM batteries. Charging and heat are the main concerns running them.

You'll find some people run diodes/voltage devices and others don't; half the batteries will crap the bed while others run fine.

If you occasionally put the battery on a batt tender you don't need to diode/voltage device to maintain the battery.

Here is one solution to running AGM but there are several others:
https://www.tundras.com/threads/gm-diode-install.134029/

HKB is another solution:
https://www.hkbelect.com/

And this is an alternate product:
https://voltageboosterpro.com/product/spark/

As mentioned before a tender that can handle AGM charging works as well if you do it periodically.

 

just get the stock size in an interstate. it's the best all around battery for your main battery.

 

I will disagree. I am a mechanic for a large fleet. Interstates used to be good batteries but have been poor for quite some time now. Plus they are very expensive. Right now I have been using Diehards from Carquest at work for awhile and have been having good luck with them, also very good pricing. Batteries are hit or miss these days. I tell people to buy the battery with the best free replacement warranty and price. Those are the only 2 things you can control as a consumer. All manufacturers have gone to free replacement warranties instead of pro- rating them. I also have Sam's club batteries in a few of my personal vehicles because of price and warranty.

 

The best battery is not always the most expensive. I've run Walmart EverStart batteries and I'm very impressed with their performance and cost.

https://youtu.be/h7rTcBanpMk?si=Zvmfk31S8cKtjNeE

 

I've been running EverStart's for over ten years definitely best bang for the buck
Easiest warranty I ever done Straight swap for one I burnt up jumping tow behind air compressor for a week
pro rated a 2 yr old one that died when I lost the alternator in my Yukon 1500+ miles from home
I usually get about 5 yrs normal use out of them

 

I've heard Everstarts are decent. I just refuse to step foot in a Walmart.

 

DeKa.

 

????

 

https://www.eastpennmanufacturing.com/about/history/

 

When my OEM batterry bit the dust the first stop was WalMart. They only had 24s in the Tundra post configuration. I asked the dude at the counter and he said they quit carrying 27s. I figure the average WalMart shopper is basing their decision on price. Next choice was Auto Zone and it is now 5+ years old and still strong.

 

Been having very good luck with AC Delco batteries. Had 5 in my boat (36v trolling mtr and 2 starting/House). Still fine after 4 plus years. 18 month free replacement. Price seemed reasonable.

 

lol. I was looking for your “unusual” reply.

 

I installed the group 24. It actually had a CCA that was higher than the group 27 I had before and it’s also lighter. I’ve been running it for about 9 months without any issues.