questions on replacing the battery

[Spawne32]

So its 16 degrees out, got a few nights here where its going to be near zero degrees. Getting the battery warnings that its seen better days. Was going to go to advance to pick up a new one but I am seeing multiple offerings of H7, H8, H9 and 94R (lead acid). Will the mount for the battery fit all of these different types or is special modification needed? Also, I dont have a VCDS for the battery coding but I do have obdeleven which allows me to do the long coding the hard way, does anyone know which particular module/channel needs to be edited for this?

[Discipulus]

I spent weeks researching this and was not able to figure out how to program a non-Audi battery. None of the aftermarket options have a BEM code to use for programming so you'd just have to fake the numbers, which could in theory cause your car to provide less optimal charge and discharge cycles, eventually leading to a premature battery failure.

I just went to the stealership and paid for a genuine Audi battery, which came with the BEM code sticker and programmed it properly. You'll pay a bit more for it but at least it will be correct and will last a long time. My original battery lasted 6 1/2 years, which is not bad I think!

[Spawne32]

lol well this is promising

[WarmFuzzies]

I bought an oem battery from a VW dealership and just dropped it in. No need to code it.


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[WarmFuzzies]

Your car will eventually learn it has a new one so no need to worry about coding. For what it's worth the new one didn't even have a code -- and I called up my regular Audi dealership to see if the one they sold there was any different from VW. Same part numbers and no code.


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[A4x]

My car went into service April 2011. Original battery. 10 degrees (F) outside.



Barely started today. But she's a champ. I have full faith she will get me to point B.

Famous last words?

[Audibot]

Can you replace with an Optima Red Top?

[Spawne32]

I hate optima batteries, id rather use the H8 AGM cell from the local auto store.

[Audibot]

Fair enough. Any reason why you hate them? I've had nothing but good results from them.

[Novarider]

Coding a non oem battery is not going to kill the battery. Not coding it is what can kill it. When you code it your just telling the computer it's new so charge it like a new battery not like one that's almost dead. All you have to do is change 1 number (any number) in the serial number.


As for the size go measure your current battery with a tape measure then go online and look at the specs. IIRC the avant takes a bigger battery than the sedan. Advance auto has a 25% off coupon right now.

@Spawne32 get VAG it will quickly pay for itself with things like this.

[Spawne32]

Fair enough. Any reason why you hate them? I've had nothing but good results from them.

Expensive, overrated IMO, and ive never had one last longer then a typical battery. I've owned 3 of them in the past 10 years, all of which died within the first 3 years. Personally I don't think gel cell batteries charge right in cars with conventional charging systems, audi's may be different but I don't think optima even offers a battery for this car.

Coding a non oem battery is not going to kill the battery. Not coding it is what can kill it. When you code it your just telling the computer it's new so charge it like a new battery not like one that's almost dead. All you have to do is change 1 number (any number) in the serial number.


As for the size go measure your current battery with a tape measure then go online and look at the specs. IIRC the avant takes a bigger battery than the sedan. Advance auto has a 25% off coupon right now.

@Spawne32 get VAG it will quickly pay for itself with things like this.

I have a vag, ill have to see if i can get the odis software to work again.

[harrybinh]

I got an AGM from advanced auto, cant remember what size (possibly h8 or h9). Dropped in, no coding. Still fine after 3yrs.


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[Audibot]

Expensive, overrated IMO, and ive never had one last longer then a typical battery. I've owned 3 of them in the past 10 years, all of which died within the first 3 years. Personally I don't think gel cell batteries charge right in cars with conventional charging systems, audi's may be different but I don't think optima even offers a battery for this car.

Gotcha. One of those "your mileage may vary" kinds of deals, as my experience has differed. But you're probably right about not having one. FWIW, Optima (Red Tops at least) ARE AGM batteries.

[old guy]

I have always had good service out of OEM batteries. They typically last a long time and are price competitive when purchased through my local VW dealership.

[14S4GWM]

You really only need to code if the car has gone into power save mode. You only need to change the last digit when coding no matter what battery you install.

[flowhigh]

Coding a non oem battery is not going to kill the battery. Not coding it is what can kill it. When you code it your just telling the computer it's new so charge it like a new battery not like one that's almost dead. All you have to do is change 1 number (any number) in the serial number.

What block do you go to do this?

@Spawne32 get VAG it will quickly pay for itself with things like this.

I think you meant vagcom or VCDS.

[Novarider]

What block do you go to do this?



I think you meant vagcom or VCDS.

Yeah I just shortened it to VAG

[Novarider]

What block do you go to do this?



I think you meant vagcom or VCDS.

Here is how to code the battery. Just change 1 number in the serial number.

http://wiki.ross-tech.com/wiki/index...ry_Replacement

[Spawne32]

got this on the obdeleven tool under that channel, just gotta figure out which digit to change

[alhutch]

Well, the first part of that value is the Audi part number for the battery (000915105DH). I'm guessing the second part is the "serial number". I'd change it by 1 digit.

[Spawne32]

mmmhmm, that might explain why thats like that, because my battery was replaced at the audi dealer back in 2012 with the previous owner, looks like they did the same thing, just changed the last digit

[fixedhat313]

You really only need to code if the car has gone into power save mode. You only need to change the last digit when coding no matter what battery you install.

Mine would go into battery mode about 1/2 the time for a few starts. It wasn't in power mode when I eventually replaced the battery, the energy management fault went away and my battery meter is back at 100% . Think I'm good to go?

[Novarider]

1234567898 is not a real serial number. If that's what the computer says the serial number is then it was changed to that by someone.

I have obdeleven and I don't trust it with things like this. I keep it in my glove box so I can scan the car if something happens away from home but that's about it.

Do you have a real vagcom cable? Know anyone that does?

[seanj130]

Just wondering, but what are you doing to kill a battery in 3 years?

Just go to you local interstate franchise and pick up a blemish battery for $35 and call it a day.

Expensive, overrated IMO, and ive never had one last longer then a typical battery. I've owned 3 of them in the past 10 years, all of which died within the first 3 years. Personally I don't think gel cell batteries charge right in cars with conventional charging systems, audi's may be different but I don't think optima even offers a battery for this car.



I have a vag, ill have to see if i can get the odis software to work again.

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[Spawne32]

So it worked out well, Just reversed the numbers to reset the code. Purchased the AutoCraft Gold Battery, Group Size 49, 900 CCA, lead acid, hooks up properly. 157.99 + a 30% discount code.

https://shop.advanceautoparts.com/p/...000%7CL3*15597

Wasn't sure if it was low on charge from sitting when I installed it but it had dropped to 70% within like 30 minutes of the car sitting, albeit my scanner was plugged into the OBD2 port, but pulled this live data.

[Novarider]

Looks like it worked great. What year is your car? I enabled the battery meter as well when I coded my battery.

You could post a few screenshot of how you got to it with obdeleven to help people out in the future.

[Spawne32]

Looks like it worked great. What year is your car? I enabled the battery meter as well when I coded my battery.

You could post a few screenshot of how you got to it with obdeleven to help people out in the future.

Very simple, gateway (19), long adaptation, channel 4. Rest of that info i just cycled through live data from the module. Mine is an 09.

[DetRebel]

I see the cold weather is giving everyone battery issues including me... let me share what I’ve found so far.


I was looking of for a concrete reason why the stealership wanted to change $400+ for a battery change but I couldn’t find much.

Some other forums said that the system increases charge that’s sent to the battery over time and coding in a new one resets this. Not doing so is supposedly kills the battery sooner.

The stealship Also mentioned the battery size has something to do with having an ami or MMI.


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[Spawne32]

I see the cold weather is giving everyone battery issues including me... let me share what I’ve found so far.


I was looking of for a concrete reason why the stealership wanted to change $400+ for a battery change but I couldn’t find much.

Some other forums said that the system increases charge that’s sent to the battery over time and coding in a new one resets this. Not doing so is supposedly kills the battery sooner.

The stealship Also mentioned the battery size has something to do with having an ami or MMI.


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Didn't see a difference in the charging rate but the battery aging calculation did reset. Not sure how that plays a factor. It seems to auto calculate battery size, type and capacity, the part # programmed plays no part cus audi has revised those numbers a couple times.

[DetRebel]

Didn't see a difference in the charging rate but the battery aging calculation did reset. Not sure how that plays a factor. It seems to auto calculate battery size, type and capacity, the part # programmed plays no part cus audi has revised those numbers a couple times.

I’m going to play it safe and pay to have it recoded after I change it my self. I have a Carista but they haven’t created a way to update the code yet.


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[Mina08]

Get a trickle charger worth every penny on these cold days/nights


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