[F87source]

Originally Posted by Nezil

I'm sure the CTEK chargers are fine, but just to close the loop on this, BMW's latest 'Advanced Charger' linked to in the second post has the part number 82-11-0-049-788, and the photo is wrong on the BMW website. It actually looks like this:

https://www.ecstuning.com/b-genuine-...35-space-~oeb/

And is nearly identical to the Deltran Battery Tender model here: https://www.batterytender.com/Batter...-12V-4A-Select.

The only difference is that the Deltran model has a 6v / 12v option in addition to the Lithium / AGM option.

Make sure you check the ripple ratings, that's also what made CTEK so good compared to the competition.