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Unread 06-07-2013, 01:56 PM   #1
Beware
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2007 MK Compass 
 
Join Date: Apr 2009
Location: Singapore
Posts: 63
Replacement battery for MK

Hi,

I'm assuming we can fit only batteries from group size 25, 75 and 86 onto the battery tray in MK. I wish to know what's the minimum required CCA for the battery?

I'm on my 4th battery now, and it just died...... ok not exactly dead but it's not 'strong' enough to crank the engine


addendum:
Sorry, I actually meant to ask: 'What batteries are you people having?'

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Unread 06-07-2013, 02:57 PM   #2
jacko15
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2014 WK 
 
Join Date: Oct 2008
Location: Pennsylvania's North Shore
Posts: 861
Sounds like you're hard on batteries. Our factory battery lasted 4 years in our '08 Compass. We replaced it with the same battery. If you want to go a little extreme, may I suggest something like this: http://www.carid.com/2007-jeep-compa...y-4406773.html
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Mine: 2014 Jeep Grand Cherokee Overland V/6 ORA II
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Unread 06-07-2013, 03:26 PM   #3
Beware
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2007 MK Compass 
 
Join Date: Apr 2009
Location: Singapore
Posts: 63
Yeah that's a good battery with CCA 720 Amps. I was looking at that too but unfortunately I'm unable to get it at my location. I do not know what our factory battery was, as it got swapped out within months after I've got my MK.

Here's my dead battery:
dsc_2903-1000x750-.jpg  
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Unread 06-07-2013, 04:31 PM   #4
jacko15
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Location: Pennsylvania's North Shore
Posts: 861
450 CCA isn't much. Can you get Mopar original equipment? Just looked at your location, and I'm afraid I probably can't be of much help, but I wouldn't bother with a battery under 600 CCA.
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Unread 06-07-2013, 07:47 PM   #5
Redpine
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2014 MK Patriot 
 
Join Date: May 2013
Location: , MIchigan
Posts: 30
Note that the OP is in Singapore. What's the climate there and what batteries are available?

My new 2014 Pat with 2.4 l engine comes with a 525 CCA battery. I'm not sure of the group size, but it looks pretty small. Interstate lists it as a group 86, but I have also seen group 25,26, and 35 as fitting (confirm yourself).

Bigger CCA is not always better. With case size remaining the same, a 700 CCA plus battery will have more, but thinner and more tightly spaced plates compared to a smaller CCA battery. The thinner, more tightly packed plates MIGHT have less longevity, especially in hotter climates.

You don't need the higher CCA's in warm climates. So, it's a trade off.

The worst enemies of car batteries are heat and repeated draw down of the battery (lights left on, etc.), which kills them quickly.

I wonder if the location of the Pat's battery contributes to higher heat?

My opinion would be not to go more than one CCA size up (640CCA +/-) because of the plate info given above.

Also, regarding Optima batteries. Since Johnson Controls took over manufacturing of this battery, the internet buzz is that quality has suffered greatly. Just a statement not based on experience. Check it out yourself.
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Unread 06-09-2013, 12:46 PM   #6
Beware
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2007 MK Compass 
 
Join Date: Apr 2009
Location: Singapore
Posts: 63
I've found a suitable battery after much searching for the past few days

Thanks for all the suggestions, hope this one will last
dsc_2965.jpg  
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