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08-02-2017, 03:18 PM | #1 |
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Battery sizes
Most of the major auto parts websites specify a H5 or size 47 battery for my M Roadster. My last battery, from Autozone an H5, was too small.
On the posted spreadsheet, I see sizes from H5 to an H7 (wow!). I'm specifically interested in the NAPA battery https://www.napaonline.com/p/NBE9848 (size 48) but does not come up as M Z4 compatible on their website. Albeit they don't allow you to distinguish between a Z4 and an M Roadster. What are the correct sizes for the M Roadster. Thanks Bruce Kaplan |
08-02-2017, 08:03 PM | #3 |
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^WHS.
Yes, I've also found that all of the auto parts chains have it wrong. H5 is too small for an ///M. H6 is stock. I hear H7 fits, if you want to go big. The Battery Options Summary Listing may be a worthwhile, albeit long, read.
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Last edited by StickMon; 08-10-2017 at 06:15 PM.. |
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08-04-2017, 02:27 PM | #4 |
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IMHO no difference at all in standard vs AGM. My original AGM battery lasted 5yrs(06-11), my second battery was LA and lasted 5yrs too(11-16). Now on my third which is an LA again. No need to spend the extra $$$ to me.
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08-04-2017, 07:45 PM | #5 | |
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Of course, if you daily drive it, then it makes no difference. That's why there is no one generic answer to this question - it all depends on the application (how you use the car - daily driven vs weekend vs special occasions vs track, etc., etc.) |
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08-05-2017, 01:37 PM | #6 | |
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08-10-2017, 05:25 PM | #7 |
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BMW have quoted me for a 70 AGM battery for my z4mc.
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08-10-2017, 06:41 PM | #8 | |
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I sorted the spreadsheet so the most recent records are at the top. Some part #s from 2012 are likely superseded. |
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08-11-2017, 08:27 AM | #9 | |
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08-21-2017, 08:37 AM | #10 | |
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09-16-2017, 11:13 AM | #11 |
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I go with AGM because LA might spill acid inside the car. I read somewhere LA batteries are for engine compartment while AGM is for inside the car.
Local auto part stores like NAPA, O'Reilly carries H6 but you have to tell them what you want instead of going by car model. |
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09-28-2017, 01:57 PM | #12 |
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I was looking for that battery spreadsheet, but couldn't find it before I replaced my battery about 2 months ago. Anyways, I just added my new battery to the list.
My car sat untouched in my garage for 14 months. When I opened my trunk there was a large area of mold growth on the carpeting right above the battery. I wonder if this had anything to do with the battery being lead acid. I ended up buying a Duralast lead acid H6 battery from Autozone. If I knew the AGM version was only $15 more I woulda gotten that instead. |
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