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      11-22-2011, 05:29 PM   #3
5280xi
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Drives: 2006 330xi
Join Date: Mar 2011
Location: Denver

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Thanks a ton Andrew. After some further research, it appears that my OEM battery has an "eye" that indicates battery life. There's a green/black/yellow status -- yellow being the status that indicates replacement. Mine's still on black but I have a sneaking suspicion that it will turn yellow soon. The battery seems to struggle in colder temps (which it didn't do last year).

I don't know if you've seen this thread, but it's a great write-up.
http://www.e90post.com/forums/showthread.php?t=292200

If you don't mind, I'll reach out when the yellow status crops up -- I'm guessing in the next month or so.

Thanks!