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Old 01-20-2008, 03:44 PM
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Default Sear's Diehard Platinum AGM Batteries

I was looking at getting one of these batteries as a dual purpose starting battery and electronics battery. The "marine" version Group 34M is 880 CCA with 135min reserve capacity and 3 years FREE replacement.

http://www.sears.com/shc/s/p_10153_1...rine+Batteries


The "auto" version Group 65 is 930 CCA with 135min reserve capacity and 4 years FREE replacement.

http://www.sears.com/shc/s/p_10153_1...tive+Batteries

They are both the same price in the store. Is there any reason I shouldn't just go with the auto version?? Am I missing something?

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Old 01-20-2008, 03:50 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

call odessey and ask - looks like the auto type will do the job better.....odyssey makes both....
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Old 01-20-2008, 04:11 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

More then likely the marine version is a hybrid/deep cycle battery while the automobile version is not a deep cycle, the marine version would be the better choice if that is the case.
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Old 01-20-2008, 04:23 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

Here is great link about batteries and why you should not use automotive batteries.

http://www.yachtsurvey.com/boat_battery_basics.htm
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Old 01-20-2008, 04:47 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

I think they're both AGM's, just sized / labeled a little differently for their application. I doubt that a user could distinguish between the two's performance. Just be sure to check the terminals and physical dimensions to make sure that they're right for your application.

Sears DieHard Platinum batt's are agm's made by EnerSys, the same company that produces Odyssey (like Glen mentioned).
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Old 01-20-2008, 06:11 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

Quote:
Glen E - 1/20/2008 looks like the auto type will do the job better
Not sure where or why you came up with that statement?

While you and I'm sure many others may use storage batteries in your boat that are designed for automotive use, and they will work fine to a point - storage batteries designed for marine use are built differently than storage batteries designed for automotive use, and for good reasons.

Notwithstanding storage batteries that are designed for deep discharge and frequent re-charge such as those used for trolling motors and heavy pump use, storage batteries designed for general marine use (ie. engine starting and or electronics & pumps) have thicker plates than batteries designed for automotive use (but not as thick as those designed for deep discharge) and will hold a charge longer, as well as run electronics and pumps for as much as 50% longer than batteries designed for automotive use. Along these same lines, due to their thicker plates, a battery designed for marine use will tolerate more and deeper discharges, as well as tolerating more frequent re-charge cycles than an automotive battery whose thinner plates are not conducive to frequent or deep discharges.
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Old 01-20-2008, 06:13 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

Quote:
First Light - 1/20/2008 9:11 PM

Quote:
Glen E - 1/20/2008 looks like the auto type will do the job better
Not sure where or why you came up with that statement?

While you and I'm sure many others may use storage batteries in your boat that are designed for automotive use, and they will work fine to a point - storage batteries designed for marine use are built differently than storage batteries designed for automotive use, and for good reasons.

Notwithstanding storage batteries that are designed for deep discharge and frequent re-charge such as those used for trolling motors and heavy pump use, storage batteries designed for general marine use (ie. engine starting and or electronics & pumps) have thicker plates than batteries designed for automotive use (but not as thick as those designed for deep discharge) and will hold a charge longer, as well as run electronics and pumps for as much as 50% longer than batteries designed for automotive use. Along these same lines, due to their thicker plates, a battery designed for marine use will tolerate more and deeper discharges, as well as tolerating more frequent re-charge cycles than an automotive battery whose thinner plates are not conducive to frequent or deep discharges.
because I think they are the same batt...but that's why I told the poster to call and ask...agreed? I'm pretty sure they are both PC1500 odyssey's
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Old 01-20-2008, 06:59 PM
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Default Re: Sear's Diehard Platinum AGM Batteries

Cabelas grp 24 has more guts and is cheaper ...


GroupSize- ColdCrankingAmps- Reserve Capacity- Price

24 1195 178 $169.99 *


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Old 01-20-2008, 09:27 PM
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Default RE: Sear's Diehard Platinum AGM Batteries

Used to work summers for a battery company in Miami. The old rule was the only difference between the auto battery and the marine was the rope handles and 1/2 the warranty. I only use auto batteries in my boats. Maybe some companies really use heavier plates, etc. None back then did, and I doubt it now too. Most auto parts stores sell the marine adapter terminals in a display right next to the batteries. Further, most companies buy their batteries from other manufacturers. Just because you used to get good service from one brand may not mean anything tomorrow. I used to swear by Interstate batteries. The last few I bought will be the last. When I called to complain about not being able to find anyone who could exchange them for me on weekends, I was told that they had switched manufacturers. I now buy mine from a national autoparts chain that has stores everywhere, and they are always open.
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Old 01-21-2008, 05:17 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

I read the specs on both batteries and according to the Sears write up the automobile battery version is not a deep cycle battery while the marine version is a deep cycle battery, there must be some kind of build difference or like the article link I posted warns, Sears has used the marine term wrongly.

I bet Sears has not played loose with the marine term and the marine version would be your correct choice.
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Old 01-21-2008, 05:39 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Both batteries have a 135 min reserve capicity and the auto has Amp Hours at 20 Hour Rate: 75 ... and the marine has Amp Hours at 20 Hour Rate: 68. This tells me they are both dual purpose starting/deep cycle batteries. Am I correct?
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Old 01-21-2008, 06:52 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Quote:
wgregan - 1/21/2008 5:39 AM

Both batteries have a 135 min reserve capicity and the auto has Amp Hours at 20 Hour Rate: 75 ... and the marine has Amp Hours at 20 Hour Rate: 68. This tells me they are both dual purpose starting/deep cycle batteries. Am I correct?
That is not correct, automobile batteries are not designed for deep cycle use, there is link I posted in an above post and it explains the difference of a starting battery which is what an automobile battery is and a marine battery.

Maybe this will give you a little better breakdown and understanding as batteries are mis quoted all the time for their use:

Starting/Automotive As its name implies, starting batteries are used to start and run engines. These have different characteristics since engine starting requires very high bursts of amperage for short periods. Starting or automotive batteries have have a large number of very thin (0.40"), highly porous plates so as to provide the maximum surface area to yield that high high burst amperage. The down side of this type of battery construction is that it does not tolerate deep discharging well, and will fail after a relatively small number of deep discharge cycles (about 400 versus 2,000 for deep cycle). Starting batteries are commonly found in outboard and many entry level boats.

These are also frequently inappropriately labeled as "marine" batteries or auto/marine. Automotive batteries are meant to be constantly charged by an alternator so as to avoid discharge rates more than 5%. Starting batteries are usually rated by CCA (cold cranking amps) or simply CA (cranking amps), and more often than not have NO rating imprinted on the label. One method of identifying starting batteries is by their price: they are always much lower priced than true marine or deep-cycle batteries, as well as their lack of any rating. There are literally hundreds of brand names of this type and many are of very poor quality.

Marine It seems as if every battery manufacturer today sells "marine" batteries but, as mentioned earlier, many such take considerable liberty with the term. Some marine batteries are deep cycle, others are hybrids, while others are pure hokum. True marine batteries are designed for dual use of engine starting and house service and are therefore hybrids (not true deep cycle). These will have spongy, porous plates that are significantly thicker than automotive batteries. They will be larger and heavier than auto batteries. A true marine battery will tolerate up to 50% discharge, whereas a deep-cycle and industrials tolerates up to 80%, whereas an auto battery will quickly die at such discharge rates. Numerous batteries found in small boats will be labeled "auto/marine" and the only way to tell the type is by cutting it open and examining the plates unless you are buying a reputable brand, but it's still a pretty good bet that any battery so labeled isn't going to be very good. There are also very many brand names of this type, and also many of low quality.

Deep-Cycle These batteries are distinguished by having much thicker plates (1/4" or 0.270" for Surette), nearly seven times thicker than an automotive battery, but high quality batteries will have solid lead plates versus others made of a lead powder composite. Lead powder plates allow for much more rapid charging but also deteriorate much faster, whereas solid or more dense and thicker plates are slower charging but have much longer service life.

Deep cycle batteries withstand greater abuse and thousands of charging cycles and have much greater service life than the other two types. They do not, however, have as great cranking or burst power, being designed to provide power over longer periods of time. Best for use with inverter systems. They are identifiable by their cost of 2-3 times that of other types and 20 hour AH ratings. True deep cycle batteries are usually only found in larger, higher end boats and yachts due to their greater cost, as well as the huge power demands of larger boats. The number of brand names of this type is relatively small since the cost is higher. Good quality ones are usually not found in discount stores or mass retail outlets.

When deep cycle batteries are used in boats, it is necessary to have considerably greater amperage than that required by the engine starter. This is almost never a problem since these batteries are used in banks of more than one battery per bank. When you get up to sizes like 4D and 8, 125 & 250 AH respectively, even a single battery is more than adequate because the amperage is so high.

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Old 01-21-2008, 07:04 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Ok, got some info.

The "marine version" of the Sears Die Hard Platnium is the same as the Odyssey PC1500 Group 34M

The "auto version" of the Sears Die Hard Platnium is the same as the Odyssey PC1750 Group 65.
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Old 01-21-2008, 08:50 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Do you have to have a certain charger to charge the AGM batteries? Does anyone know what Cabelas warranty is on there AGM batteries?

Thanks Charlie
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Old 01-21-2008, 08:58 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Quote:
sharkfisher - 1/21/2008 8:50 AM

Do you have to have a certain charger to charge the AGM batteries? Does anyone know what Cabelas warranty is on there AGM batteries?

Thanks Charlie
Any of the new digital chargers can be set for different types of batteries, I have Promariner sport12 charger on my boat.

Just becareful of older chargers as they can over charge the battery and damage it.
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Old 01-21-2008, 09:06 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

cabellas agm batts charge just like any flooded batts...no change in charger settings....I'm running 4 cabellas going on 4 years with a promariner 300 charging 24/7 when the boat is stored....batts test both load and voltage like new
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Old 01-21-2008, 10:01 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

My boat is kept on the trailer. I just use a automotive Die Hard charger it has 2 different switches. The first switch is for a Conventional low maintenance battery or maintenance free deep cycle. Which one would I use? The other switch is for a 2 amp , 10 amp and a 50amp quick start. Which one of these would I use? Would this charger be alright to use on the AGM batteries? I have to replace my batteries this spring and it will be with either the Cabelas or the Die Hard AGM's.

Thanks Charlie
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Old 01-21-2008, 10:29 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

I have the same Sears charger be careful with it as it will over charge if you don't watch it, I think the paper work on it says it can trickel charge but I have noticed it will over do it. By a nice dual bank charger it will do every thing and it is very nice to be able to just plug in the boat and the charger takes care of everything. I went with the ProMariner 12Sport dual bank charger on my boat, was not to bad cost wise and seems to be well built.

Get the 110 plug holder as well.
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Old 01-21-2008, 10:41 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

Thanks John I will check out the ProMariner. It would be nice to come home and just plug it in.
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Old 01-21-2008, 11:24 AM
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Default Re: Sear's Diehard Platinum AGM Batteries

I just went out and checked my 2 batteries on the boat. One is a Deka 24m7 MCA is 1000 and the CCA is 875 the other battery is a Deka DP24 the MCA is 650 and the CCA is 525. Which Cabelas AGM batteries would I want? Also on Cabelas site they have a sale going on that includes 2 AGM batteries and the Pro Marine charger in a kit. Can someone tell me which one of the kits would work on my boat? I am completely confused HELP!!!

Thanks Charlie
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