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      11-27-2009, 07:05 PM   #22
tom @ eas
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Drives: BMW
Join Date: Nov 2005
Location: Anaheim, CA

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Garage List
2010 BMW M3  [5.00]
2015 BMW M4  [3.50]
Originally Posted by elp_jc View Post
Is everybody replacing the stock battery tracking the car??? It's nice to save some weight, but at 480 vs 900 CCA it's almost HALF as powerful. Not a smart choice for somebody using the car infrequently, and is sub-freezing temperatures in winter. But a good option for those obsessed with weight savings . And hey, isn't the car supposed to be better balanced with the weight of the stock battery? Yeah, probably minimal, but so is the weight savings. Just playing devil's advocate .
You bring up a good point. Here's the 06+ MZ4 battery:

For an additional 9lbs, you get 760CCA (37% boost).