Keep potong I guess...
I used to sell Varta before.
Now all Varta AGM made in South Korea, sudah murah ......

Some stockist I know dun keep Varta anymore due to South Korea production, quality drop.
Banner AGM DIN105 is around RM1300 +-

Most of the Varta Germany I saw max out around 5 years.... but 8 years? wow.

1. I do not produce those batteries myself, so I'm not sure why Germany AGM last longer than Korea AGM.
2. I only can speculate that back then Varta AGM Germany was being manufactured at condition way over spec so it can last really long.
3. Varta AGM Korea only available after Johnson Controls acquired Varta (where people start to see blue dynamic, black dynamic, and they thought these also from Germany) Initial stage I was told Korea can produce up to DIN95 AGM, anything bigger, nope (that's what the news I know 2 years ago, now not sure).
4. As for Johnson Controls Korea AGM, they dun produce them as over spec as those previously made in Germany anymore, thus the price cheaper and more people can "use" Varta AGM

If I'm Varta, I will ensure the battery will last longer than warranty period but will not last for a long long time, else there will be no recurring business.

* 8 years ago, Johnson Controls if not mistaken, haven't purchase Varta just yet.
* Mercedes apparently switching to FIAMM from Varta as their OEM battery supplier