Which optima?

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panda24619

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i know i need a yellow top. but what size do i need? i couldnt find that chart that tell you.
 

SOLISIMO

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I used to swear by optima untill I read their reviews. Looks like they changed ownership and the quality has gone down. I did some real deep research too about a year ago and decided not to go with them. Ended up with the Sears megatron and couldnt be happier.
 

ExpyPlowGuy

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I was looking into the optima batteries since I run a plow and have some high current demands. Read a lot of bad reviews on them as far as holding their charge if the car sits for more than a few days and after that it no longer holds any charge. So I went with a napa battery instead.
 

tonydiv

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I have two of them wired in parallel, and in the summer my truck will regularly sit for 4 or 5 days in a row. Never had any problem, even with quite a bit of parasitic draw from various equipment. A big part of the reason I chose them was because I knew that I'd be adding a winch in the future.

There is no question that AGM battery technology is far superior to standard flooded types.
 

alaskanexpy

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i used to all ways run optima, but like has been said they are not what they used to be. i had a red top in my explorer, 4 years and never been discharged one day it was dead and would not take a charge.

since then i've been going with the $89 wal-mart batterys with 1150CCA IIRC, 3 year free replacement at any walmart. has worked for me in the last 3 years on a few trucks without issue.
 

JDMitchell

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I have owned two seperate Optima batteries. I had a red top in my Denali and a yellow top in my G35. I never had a single problem with either of them. I am actually shopping for a battery right now and will probably go with either NAPA or Bosch with at least 850 CCA, I just don't see the point in spending $140+ for a battery that doesn't have any better of a warranty.
 
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panda24619

panda24619

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so never mind on optima now! i need something that has deep cycle in it. right now i kill my battery if i keep my doors open for a few hours. it holds its charge fine, but i know if i keep doing that its gonna die. i throw the batt charger on it when ever i know its going low. exactly why i got the volt meter. its funny to see it say 11.6 and itll start. 11.4 it barely starts and 11.2 nope... i get why .4 of a volt makes that big of a deal. but what ever... i know its from me killing it a few times over the years. the date on it is dec 07. thats when we did the alternator. i know optima used to be real good. my uncle ran 2 on his jeep when ever he went wheeling and one when he was on the streets. but i guess now they are crap... looks like i gotta do some research on some deep cycle batterys. o and right now i have a napa battery. love it. i just killed it too many times. need to do the big 3 and get a deep cycle.
 
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panda24619

panda24619

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mainly. what size is the battery? so i know how big of a battery i need to get is. im thinking about putting it in the rear too. always an option.
 

jacks3am

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I believe our minimum cca is like 825-850, I would get a 1000cca and make sure its a diehard, I got a poopy battery im expecting to take a shit on me so I got the reciept!
 
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panda24619

panda24619

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my dads heep has a diehard. so i might have to go get one. do they make one in the size i need with the terminals and holes??? make sense??? idk what they are called. haha cause i want to make it look a little cleaner with both sets of terminals.
 

2000eb

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both sets of terminals? no point some come with two sets cause gm uses the screw in type to be different. and i had that conversation the other day about optima going down hill. in az a batt normally lasts 2 years max cause of the heat. i had an optima last 4 and still kickin when i sold the truck. a buddy got an optima and it didnt last a year so we where wondering wtf happened to optimas being so great but that makes sense if they changed ownership
 
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panda24619

panda24619

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like the terminal and screw in type. i want both. my dads jeep battery has both. just mainly so its cleaner at the terminals.
 

Thermo

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Choosing the correct battery is key with how you use the truck. I know a thing or two about batteries. Worked around some capable of powering a small town (10,000+ amps at 300ish volts, just a little power you understand). If you think you need a deep cycle battery, then I recommend going with a dual battery setup where you have a deep cycle for all of your loads and a starting battery for getting the motor running. I can get into the different constructions of the various types of batteries and why one is superior over another when it comes to comparing starting vs deep cycle vs marine type batteries.

Please keep in mind that in the world of batteries here in the US, you ultimately have 2 manufacturers to choose from, Exide and Johnson Controls. PERIOD!!!!!! The only difference between say an Exide battery and a Wallyworld special is the sticker on the outside and the garantee that the "manufacturer" (used loosely here) puts on their batteries. I'm sure the guys over at FTW remember the big write up I did about batteries.

So, ask away. I will explain just about anything when it comes to batteries and in a way that almost anyone can understand.

Panda, as for why at 11.6 VDC the truck starts fine, but at 11.2 VDC it won't start? It isn't so much the 0.4 VDC difference, it is the characterist of a deep cycle battery and the amount of plate left. Dipping below 11.6 VDC you start to get the plates to get thin and that results in less surface area. The less surface area, the harder a time the current has getting through the battery, leading to increased resistance. Even something as simple as 0.01 ohm increase in resistance when starting you truck (which takes about 125 amps), that 0.01 ohm becomes a 1.25 VDC drop inside the battery. Add that in addition to the 0.4 VDC difference and the possibility of the battery having more than a 0.01 ohm increase and you can really start to get serious voltage drops inside of the battery. You also have the effect of having less electrolyte, which also leads to increase resistance, but that is a bit more involved of a discussion and a good knowledge of chemistry is advantageous.
 
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