Hi guys
I think my battery is on its way out and I was contemplating a light weight battery as a replacement. Our OEM batteries weigh over 70 pounds so there could be quite a saving. I understand that the Odyssey PC680 is a decent lead lightweight battery. Are there any other suggestions or experiences of a lightweight battery? I’m also considering Lithium as an option.
Thanks
Richard
Hi guys,
I assumed no one had any experience, but I’ve just ordered a 8kg Lithium battery from iTechworld (Australia) with 60aH and 1300CCA. I’ll keep you posted how it goes.
Thanks,
Richard
let us know how it goes
That’s the one!
I spoke to them on the phone, the guy has had one in his v10 BMW M5 E60 and later in the v8 turbo BMW M6. I also found out that the battery can be run down to 20% unlike a standard battery 50%, so from an available capacity perspective is close to our OEM battery.
It will be here within the week and I will keep you posted.
Unfortunately the only battery they had was the wrong way around, so I’m waiting until they have the correct one in stock, but looks like that won’t be until end of March. So i’ll try and limp around with my current battery until then 
Older thread but don’t go with the PC680, too small. With the Odyssey don’t go smaller than the PC925t. I ran one for a years in my C5 RS6 but finally upgraded it to a Antigravity T6, lighter than the Odyssey with as much CCA as the stock although for a lot more money. Should last longer so that’ll take a bite out of the cost in the long run.
Thanks mate… unfortunately they’re completely out of stock of the lithium correct sided battery. So I’ve just had to buy a standard replacement battery that weighs 23kgs. Ah well maybe next time
What’s the adaptation process for a new battery in VCDS?
The battery place I went to had some specific software to code the battery. However with VCDS you need to change the battery manuf number and serial number, ideally to the exact number on your battery. This tells the car the specs of the battery and recognises that it’s a new battery. If it’s not an Audi specific battery then you can just alter the serial number and the car will recognise it’s a nee battery.
If you’re replacing it with a different size battery then you’ll need to find a similar battery specs that you can code to VCDS.
There are a few guides out there and on YouTube if you search code battery vcds. Here are some screenshots as examples.
And if you search you will find sites with more specific information than in VCDS that will tell you which part numbers go with certain Amperes and some will tell you which batteries are AGM’s. For my Antigravity Lithium (Audi doesn’t list any Lithiums), I found a AGM battery with the approximate Amperes and all seems fine. Coding the right battery became a bigger deal starting around 2009~2010 when Audi started to incorporate what they call Regeneration. When braking hard the Alternator will slightly overcharge the battery so when you accelerate it cuts power. There is a great thread on it under the A5/S5/RS5 section on here and how to defeat if if you are having issues.
