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  #31  
Old 12-19-2008, 07:03 PM
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Originally Posted by Uncle Ben View Post
My accessory batt is a Deka 31 and my primary is a Deka 78. Both are AGM's
Thanks Kevin

Found a pretty good comparison on their site amongst different construction types
http://www.eastpenn-deka.com/assets/base/1081.pdf
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  #32  
Old 12-19-2008, 08:32 PM
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I thought others would find this of interest

The Die Hard Platinum (Odyessy), Red Top Orbital and Deka are the top three batteries based on Consumer Reports and real offroad testing

The Orbital Exide is not known for long life, found that out myself on two of them

The Deka has the outstanding reserve capacity to run the Holy graille at night, per Kevins use and Consumer Reports testing

It would have been interesting if they had included the Yellow and Blue Top Optimas in their test.

From Consumer Reports
Our battery-life test is based on a standard recently adopted by the Society of Automotive Engineers. Our test includes partially draining and then recharging each battery almost 3,000 times over a 10-week period, during which the battery must meet voltage and amperage limits based on real-life demands. The highest scorers maintained higher voltages and were able to withstand more cycles.
In addition to how we test car batteries for endurance, our reserve-capacity test measures how long an auto battery can supply power if the charging system fails or if you leave your headlights or accessories on. The lowest-scoring models in our test should provide 1½ hours of power. Higher-scoring models can supply power well past 2 hours.
We also test for cold-cranking amps (CCA). That’s the measure of current that’s available at 0º F and is the primary indicator of cold-climate performance. CCA has long been a major selling point for batteries. But we believe that the industry’s claimed CCA doesn’t reflect real-world conditions because batteries are charged at a higher voltage than the 14.5 volts provided by most vehicles’ alternators. Our CCA test is based on more realistic charging voltages and amperage demands, and our results show each battery’s relative cranking power, regardless of the manufacturer’s claims.
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  #33  
Old 12-20-2008, 08:51 AM
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Romer...thanks for posting this CR data. Makes me feel OK about my DieHard Platinum. I will say that it is the HEAVIEST battery I have ever picked up!!! I'm about 6'3" and it took everything to get it up and seated in the battery tray!!!

Because of the way my Optima was installed by PO, I had to turn the battery facing backward. I still have a few things I need to do to clean up the install. I'd like to get some of the Military Style clamps and increase the gauge of the wires, but I will probably wait until I find a winch before I take the time to do this. Maybe when I re-wire, I'll turn the battery around facing forward?
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  #34  
Old 12-20-2008, 09:11 AM
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Quote:
Originally Posted by Largerone View Post
Romer...thanks for posting this CR data. Makes me feel OK about my DieHard Platinum. I will say that it is the HEAVIEST battery I have ever picked up!!! I'm about 6'3" and it took everything to get it up and seated in the battery tray!!!

Because of the way my Optima was installed by PO, I had to turn the battery facing backward. I still have a few things I need to do to clean up the install. I'd like to get some of the Military Style clamps and increase the gauge of the wires, but I will probably wait until I find a winch before I take the time to do this. Maybe when I re-wire, I'll turn the battery around facing forward?
You are right there....these batteries are definately heavy! The group 31 Deka I have is 71#'s!!!!!!!!!!! Royal biatch to get in and out of the battery box!
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  #35  
Old 12-21-2008, 07:36 AM
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That would be a real pain to lift two of them to hang under the rear deck...

I'd need a hydraulic lift!! And more spring lift in the rear.

So why didn't CR recommend the top three?
Oh yeah... they are CR.
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  #36  
Old 12-21-2008, 11:34 PM
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Their "best buy" recommendation is always very good quality for a great price, not the best quality at any price. But they always show you their rankings, so you can buy the top rated _____ if you so choose. That's almost never the bargain.
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  #37  
Old 01-06-2009, 09:22 PM
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Went to Hensley Battery and picked up two 2nds for 75 bucks total. They also have pre made battery cables for those looking to be replaced. Service was good.
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  #38  
Old 03-23-2009, 02:54 PM
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I picked up the Deka 31 and a Deka 78 AGM. I was suprised just how small the 78 is and how big the 31 is! Both are installed minus the hold down for the 31.
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  #39  
Old 06-04-2009, 02:34 PM
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I picked me up a 9A34.. AGM. we'll see how it goes.
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  #40  
Old 06-04-2009, 04:21 PM
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group 31!!! that's a big freakin' battery...class 8 tractor trailers run group 31s
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