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Originally Posted by 135
How is the Odyssey battery going?
How does it compare to the standard AGM (Ah, CCA)?
Looks like Odyssey have a range of AGM batteries. PC1100/ER40 Extreme Racing seems like a good compromise if it will fit. 12.5kg/27.5lbs, 500cca but 1100cca for 5sec burst. Not sure how many Ah it's rated at.
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Odyssey is a standard AGM battery. PC925 has been great. If you mean how does it compare to a stock 800cca battery then I would say the answer to that is obvious. It has 1/3 the AH capacity. Definitely better than generic brand 400cca batteries though. It still starts the car just fine after 2 years.
If you don't drive the car much, keep it on a maintainer. Parasitic draw of the BMW electronics will run it flat in about 7-10 days. If you daily in <30f, you may not want to risk such a small battery. The 28lb one might be better."burst" rating aside, the PC925 will struggle in a cold snap and go flat in a few days. best to run two of them in the winter and just take one out in the summer. or, swap stock battery back in etc.