Upgrade to 51R battery worth it? - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums
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post #1 of 37 (permalink) Old 07-08-2016, 01:50 PM Thread Starter
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Upgrade to 51R battery worth it?

I have the chance to pick out a new 12v battery for my car.

Should I get the 51R, or the 151R stock size? Mind you, this will be a replacement Duralast Gold.

I'm thinking about the 51R, as I remember this winter my car didn't want to start a couple of times. I wondered if this was due to battery size and the cold weather.

Let me know if you have upgraded, if the weight made any noticeable difference or not and if the update is worth it.
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post #2 of 37 (permalink) Old 07-08-2016, 04:17 PM
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I have heard good things. It is heavier slightly, and longer also. The battery tray needs to have the right wall cut.

Replaced 12V battery

"I had to slightly modify the battery tray inorder to fit longer battery. Width and height is same just length is longer. I took the oem battery tray out, cut out the right wall( driverside shorter wall) and it fits perfectly."

P.S. and off topic: read the message I sent you about the dragon! need to know soon!

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post #3 of 37 (permalink) Old 07-09-2016, 09:16 AM
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I'd stay with the stock size, just to skip some hassle. And check your local battery sellers, beside chain stores. They'll give you the best information, and probably the best price.

Almost all the batteries in the US are made by Johnson Controls, including Optima batteries.
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post #4 of 37 (permalink) Old 07-10-2016, 10:56 PM Thread Starter
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True that.

This winter my car didn't want to start a couple of times because of the cold. I wonder if the batt is just getting old, or if the 325CCA is underrated or something for the weather in this area?

Hmm..
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post #5 of 37 (permalink) Old 07-10-2016, 11:43 PM
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True that.

This winter my car didn't want to start a couple of times because of the cold. I wonder if the batt is just getting old, or if the 325CCA is underrated or something for the weather in this area?

Hmm..
I just helped my Dad buy a new Battery for his car. In the same size(group) battery there are lots of different ratings. You can get more CCA (Cold Cranking Amps) than OEM and not have to modify anything. Just something to consider and we do not have a top to our battery boxes so if it is a smidge taller no big deal. Make sure you clean the clamps with a metal brush, use the little fiber washers( to absorb acid) and cover posts and clamps with dielectric grease.

The batteries in CR-Zs tend to die an early death 3 years seems to be the limit( I know some have not had this problem).

Other cars I ( and family) have had the OEM batteries lasted more than a decade or in some cases multiple decades. But we too have had some batteries die within 3 years or less. Just depends on the car and what kind of life the car has had.

I hope this helps this discussion.

Last edited by Spdbump; 07-10-2016 at 11:55 PM. Reason: Clarification and grammar.
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post #6 of 37 (permalink) Old 07-11-2016, 12:58 PM
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I don't think the 12V battery's CCA have much to do with starting, unless the hybrid battery is down. I've never heard my starter motor, the IMA does the starting, and silently.
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post #7 of 37 (permalink) Old 07-11-2016, 01:52 PM
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I don't think the 12V battery's CCA have much to do with starting, unless the hybrid battery is down. I've never heard my starter motor, the IMA does the starting, and silently.
Doesn't it depend how cold it is? We all know that if the under hood battery is dead it won't start no matter how much charge the IMA battery has. But my other posting was a very general one not CR-Z specific.
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post #8 of 37 (permalink) Old 07-11-2016, 09:11 PM
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Quote:
Originally Posted by Spdbump View Post
Doesn't it depend how cold it is? We all know that if the under hood battery is dead it won't start no matter how much charge the IMA battery has. But my other posting was a very general one not CR-Z specific.
I thought the 12v battery only needed enough power to communicate the the IMA, in order for it to do the silent start, and the 12v cranks the starter (which I've never heard a peep out of) only if the IMA doesn't reply in kind.

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post #9 of 37 (permalink) Old 07-11-2016, 09:48 PM Thread Starter
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It definitely gets cold enough here in winter for the starter to work. I've used it several times. Usually the IMA will fail to start the car, you will have to put it into neutral, and then the regular starter kicks in. This is where the CCA helps (or didn't help more like it).

What is the highest rated CCA battery we can get? I think its 335. Never seen any above that. So unless I upgrade to a newer battery and HOPE it will work, I might want to consider something with a bit more cold cranking amps. You people in cali won't understand. When its -20 out, nothing wants to start here..
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post #10 of 37 (permalink) Old 07-11-2016, 09:55 PM
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Autozone had many different CCA batteries for my Dad's car. I presume similar is available for us. How do CVT guys activate the "emergency conventional" starter? ( I should check my owner's manual now that I moved North.)
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It definitely gets cold enough here in winter for the starter to work. I've used it several times. Usually the IMA will fail to start the car, you will have to put it into neutral, and then the regular starter kicks in. This is where the CCA helps (or didn't help more like it).

What is the highest rated CCA battery we can get? I think its 335. Never seen any above that. So unless I upgrade to a newer battery and HOPE it will work, I might want to consider something with a bit more cold cranking amps. You people in cali won't understand. When its -20 out, nothing wants to start here..
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