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09-30-2009, 12:03 PM | #133 | |
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Its close - there's a detailed comparison here: http://www.m3forum.net/m3forum/showthread.php?t=153047
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09-30-2009, 03:28 PM | #135 | |
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09-30-2009, 06:35 PM | #136 |
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Yes, you can use the stock mounting clamp to secure the battery in one of the other holes in the floor of the trunk.
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10-10-2009, 07:27 AM | #139 | |
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Mini Cooper OEM battery specs: 55Ah 640CA/480CCA In my experience, battery weight and battery power are tied together very closely. After extensive trial and error, I can tell you without hesitation that I have never found a battery with a huge disparity between these two key details that actually worked long term. I am always amused by some of the claims made in regards to these small batteries, as each individual application has it's own unique current profile. BMW electrical systems are a very erratic in regards to a predictable/consistent current draw.The various modules in the car seem to have a mind of there own. The reason I suggested the Mini Cooper battery to swamp2, is because it seems to be the perfectl balance between power and weight reduction. (for his application) It suits his needs for a lighter weight replacement for the stock battery. (that has fewer downsides than the aftermarket options) The aftermarket alternatives are a crap shoot IMO. Having dealt with the headaches associated with this particular mod, I have acquired quite a bit of anecdotal experience in regards to these battery swaps. The Mini Cooper battery has the nessesary size and power to work for what swamp2 is looking for, and it's also a more realistic size for the E9xM3. (long term)
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Last edited by Lemans_Blue_M; 10-10-2009 at 09:06 AM.. |
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10-10-2009, 07:30 AM | #140 |
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Correct, it's a factory re-branded Exide 55Ah battery at was standard eqiupment (OEM) in the E46 M3 CSL in 2003.
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10-10-2009, 09:04 AM | #141 |
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10-10-2009, 09:56 AM | #142 | |
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10-10-2009, 02:46 PM | #143 |
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Well, since these lightweight batteries are physically smaller (and less powerful) than the stock 90Ah battery, you have to manage the power drain a little more carefully.
Your margin for error is now less than it was with the factory equipped battery. So you can't make foolish decisions that can get you into trouble. That means you have to monitor your usage when the key is off, and make sure you don't leave anything on inside the car that can drain the battery. Many plug-in accessories will do this, as will listening to the radio/CD etc. with the engine off. Regardless of which size battery you choose, you must be vigilant in keeping a tight reign on your current consumption. (the part YOU can control) The Mini battery allows you a more comfortable margin of error between the 90Ah stocker, and the lightweight 20-30 Ah aftermarket alternatives.
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10-11-2009, 12:57 AM | #144 | |
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O yeah,
I am on top of that haha ... You should see my fiancee, she is turning everything off before she leaves the car ( radio, heater/ac, unplugs charger, turns off V1, even turns the light switch from "auto" to off haha ) so, every time I get into my car after she was driving I feel like I am in brand new vehicles and everything needs to be set up again ... :d Quote:
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10-12-2009, 01:34 PM | #145 |
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Mail order or in person? Buy on the web or call? Are you sure on the pricing, very low?
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10-12-2009, 09:20 PM | #146 |
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10-12-2009, 10:36 PM | #147 |
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10-12-2009, 10:43 PM | #148 |
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so is the braille battery crappy? I want to switch out my stock battery in my e92. So is everyone feeling the mini battery is a better choice?
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10-12-2009, 11:09 PM | #149 |
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10-12-2009, 11:10 PM | #150 |
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10-13-2009, 10:56 AM | #151 |
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11-14-2009, 10:10 PM | #152 |
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You are a genius!! The Mini Cooper, aka CSL Battery was a direct bolt in, fit like OEM, perfect fitment! My Braile LW battery would always go out on my VFE SC'd E46 M3, so the MC/CSL battery was a good compromise. Turned out to be about a 24 lbs. weight savings, not too bad for 130, bucks. I will post pics soon, really appreciate this post - doba, Lemans and everyone else. Thank you!
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11-16-2009, 12:27 PM | #153 | |
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11-16-2009, 01:46 PM | #154 |
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Good info as always Tom.
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