Upgrading Battery - VW Jetta VII - Optima DH6 YELLOWTOP PUREFLOW from H5 EFB

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Had a bad battery in the Jetta.

This was a Johnson Controls H5 sized EFB. It was the original battery and rated at 320DIN, 640SAE CA. it tested at 99DIN after charging.

I did some research and found the part number for a AGM H6 sized VW battery and it was over 450.00. So for less than that I decided to go with the Optima DH6. This is a pure lead battery but is not a traditional Spiral Cell we are used to from Optima. (None of their DIN H5/H6/H7 are) I know Optima gets some hate, but I've had good service from them.

The Jetta battery tray has room for the H6 and provisions to install the hold down at the correct position for an H6.

EFB_H5_1.jpeg


Easy enough to remove. I used a couple of mini bungee cords on the cables to hold them out of the way.

EFB_H5_2.jpeg


The offending battery out. Though really it gave 5 years service, so I don't suppose I have a huge complaint.

OptimaH6EFBCompare.jpeg


A comparison, though I should apologize that the Optima is sitting on a 4x4 creating the sense it is much larger than it actually is.

OptimaH6_2.jpeg


The new Optima. They omitted the AH on the label its 72 (also not thrilled about that as you need it to program) but it is on the website.

This battery was not especially fresh on the shelf at AAP, but tested at 100% SOC and SOH and 1211SAE CA. (I'm not sure they love me but I always check a new battery before I leave.) I gave it a maintenance charge with an Optima 400 before I installed it anyway.

OptimaH6.jpeg


Much tighter fit. If you're particular you may want to tape (or remove) the to air box lid. This is where the cables being held out of the way comes in handy, because you will have to drop it in the battery tray and slide it all the way forward to allow the rear to drop down and slide into the hold down moulded into the tray. Once the rear hold down is engaged push the battery rearward and install the front hold down in the more forward position.

Easypeasy.

Now to programming:

My factory battery was set to JCB, EFB, Serial number 1111111111 in spite of the BEM code on the battery saying EMC (Jonson controls Mexico) and having a serial number.

There is some debate on line which I've discussed in other threads but I set mine to JCB (Clarios bought JCB), Fleece, and serial number (the date installed) and 72 AH (the old one was set to 59) The module also did not want to accept alpha characters so I added 2 zeros to get 10 digits.

I'm convinced that the AH, Chemistry and changing the serial number is all that really matters.

Back on the road.
 
That is strange VW battery failed so fast. Ours in Tiguan lasted 9yrs and I replaced it bcs. started slow crank )did not die suddenly).

My opinion - It was an absolute minimum spec battery.

And this one did fail pretty quick, I check it every service and it tested good at the last tire rotation, though slightly down on CA, but went out to go pick up the Granddaughter and Jetta would not start.
 
My opinion - It was an absolute minimum spec battery.

And this one did fail pretty quick, I check it every service and it tested good at the last tire rotation, though slightly down on CA, but went out to go pick up the Granddaughter and Jetta would not start.
Could be. Cannot remember Ah in Tiguan.
 
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"Minimum" would be 44 Ah or so, not this 59 Ah und 640 A (CCA?). Bigger doesn't mean longer life.
Even a 44 Ah would easily crank this tiny 1.4 TSI. I had VW batteries to last ~15 years in the past and
my Mini's factory battery is 12 years old. Not sure if I'd consider this Optima as an actual upgrade.
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"Minimum" would be 44 Ah or so, not this 59 Ah und 640 A (CCA?). Bigger doesn't mean longer life.
Even a 44 Ah would easily crank this tiny 1.4 TSI. I had VW batteries to last ~15 years in the past and
my Mini's factory battery is 12 years old.
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Yeah, you've said most of that already.

By minimum I mean EFB for the most part. It's a cost saving battery IMO. Cant really blame them it was a fairly cheap car in the grand scheme of things and has had precisely 2 "failures" this battery and a door lock actuator (which was fixed under warranty) so I'm not really whining about it.

Not sure why you believe your Mini and other VW batteries are really relevant here, this is clearly not one of those batteries... :unsure: I too have had OE batteries last a long time, I'm sure this one will last a long time.
 
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This battery is sitting in the engine compartment while BMW use to use
AGM and use to place them in the trunk. No fluke, not at all.
EFB is superior to AGM when it comes to this highish temp environment.
It's not cheap, it's just appropriate for this application, if not better.
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Oh and since it isn’t properly marked my guess is 640A is CA not CCA. (Which is consistent with the times I recorded the test results in SAE)

Also, I had the proper shield because a vendor sent me the wrong one after the original got looking shabby not long ago, so if you upgrade you’ll need a new one if you want to retain it.
 
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So, I did finally get a reply from Optima.

They confirmed The H6 Optima should be set to "Fleece as it is not Spiral cell".

Still digesting the programing instructions, but it seems to indicate the serial number change is all that's required if replacing like for like. They recommend changing the 4th digit for some reason. Obviously if you change the chemistry or size that needs to be adapted.

Also One of the Golf guys has some good info.

https://www.golfmk7.com/forums/inde...bigger-capacity-battery-to-a-mk7-golf.320084/
 
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I'm a Optima red top hater, as I had three of them fail in a row, all ended up leaking after one to two years.
BUT, the yellow tops do test well in some sizes in Consumer Reports testing, so they may be fine. I guess just avoid the spiral variants.
 
I hover somewhere between the Deka AGMs and the X2Power which BatteriesPlus carries. I’d be interested to know how this yellowtop holds up. I do remember the first optima’s that came out, what…. 2 decades ago?… were basically groundbreaking for the enthusiast. I remember meeting a guy with 20 Bluetops mounted in the bed of his pickup to power his camper AC through an inverter…. He put them to work….
 
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