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Old 01-31-2013, 09:30 PM   #11
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Originally Posted by l24x4 View Post
A good buy you think? Coming home after I got the picture I decided to stop at a auto parts store and see what they had. Exide MDC 27 not the MDCST. Asked on price. They said 115 with a 10 dollar core. Asked if they would price match. Sure he said. told him about the MDCST at manards for 69 bucks and showed him the picture. Response was I took a picture of a cheaper battery price and was trying to rip them off. They called down there and was told that was the correct price. Then was asked to leave! Maybe I should go get some.
I assure you that that price is a steal... I would get a pair at that price and replace what I have.
210 AH is way cool for a trailer; and at 140 bucks it is slam dunk.
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Old 01-31-2013, 09:52 PM   #12
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Old 02-04-2013, 12:59 PM   #13
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Found this battery on Manards website...
NG-27 12 Month Exide Nautilus Marine Deep Cycle Battery at Menards

Price on the website says $68.97 each. Probably not a bad investment to give them a try even if they only lasted a couple seasons.
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Old 02-04-2013, 01:10 PM   #14
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wow - just checked pricing at my store - also $68.

But my MH is a 2009....well that IS 4 years old....
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Old 02-04-2013, 02:08 PM   #15
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Originally Posted by itat View Post
Found this battery on Manards website...
NG-27 12 Month Exide Nautilus Marine Deep Cycle Battery at Menards

Price on the website says $68.97 each. Probably not a bad investment to give them a try even if they only lasted a couple seasons.
I am not sure about how they are calculating their AHs. At 182 RC in minutes the AH calculation (multiply by .4167) makes this a 75 AH battery and that makes sense since it is a Dual Purpose Marine battery and has CCA listed.

DP batteries run in the 65 - 85 Amp Hour range and you typically need a dedicated deep discharge battery to get above 90 amp hours.
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Old 02-04-2013, 02:23 PM   #16
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Originally Posted by herk7769 View Post
I am not sure about how they are calculating their AHs. At 182 RC in minutes the AH calculation (multiply by .4167) makes this a 75 AH battery and that makes sense since it is a Dual Purpose Marine battery and has CCA listed.

DP batteries run in the 65 - 85 Amp Hour range and you typically need a dedicated deep discharge battery to get above 90 amp hours.
The only difference I see is that they are rating the battery at 20 Amps and your calculation is at 25 Amps. Could that be the difference in AH's?
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Old 02-04-2013, 04:38 PM   #17
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This is how AH are calculated from Reserve minutes.
Attached Files
File Type: pdf Convert RC to AH.pdf (141.3 KB, 91 views)
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Old 02-04-2013, 05:42 PM   #18
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autozone for around 75 bucks

I picked up one a while back
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Duralast/Marine battery - 12 months free replacement






Part Number: 24MD-DL
Alternate Part Number: 24MDP-DL

Features & Benefits

Duralast Marine and RV Batteries are designed to get you and keep you on the water! Duralast Marine Batteries are manufactured with the Cold Cranking Amps, Reserve Capacity and vibration resistance to keep you operating in the demanding Marine and RV environments.
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Part Number:24MD-DLWeight:45.41 lbs12 Volt
550 CCA
Application:MarineBCI Cold Cranking Amps (CCA):550BCI Cold Cranking Amps Value:Tested to BCI StandardBCI Designation:24Battery Height:225 mm - 8 7/8 inBattery Length:260 mm - 10 1/4 inBattery Width:173 mm - 6 13/16 inCore Charge Applicable:YesEN / DIN Designation:Not ApplicableJIS Designation:Not ApplicablePositive Terminal Side:LeftPost Location:Top PostReserve Capacity (min):140Voltage:12MSDS Information: Click to View
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Old 02-05-2013, 09:41 AM   #19
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This is how AH are calculated from Reserve minutes.
I'm not doubting your calculation Herk. I simply stated this because if you look closely at what the OP stated and the picture he took, it appears the manufacturer is trying to cheat the system a bit and go with a 20 AMP draw and not the 25 AMP draw that is in your calculation. If they did that, it would then overstate the actual AH's of the battery. (Unless I am thinking wrong on that).
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Old 02-05-2013, 10:59 AM   #20
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I see what you are saying, by using the lower 20 amp discharge rate to calculate amp hours, it makes it appear that the battery has a higher amp hour rating than the competition.

Sneaky!
Attached Files
File Type: pdf Battery Ratings.pdf (177.4 KB, 47 views)
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