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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 12-20-2013, 08:05 PM
Lanier Lanier is offline
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Mein Auto: 328ix
New member, battery question winter storage

Hello, I am new to this forum and trying to seek an answer to the following concern. We have a 2011 328ix that will be sitting for at least 5 months next winter in a cold NJ garage. We are looking for some info how to keep the battery charged for this length of time. We have read about a trickler, thoughts and suggestions truly appreciated.
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  #2  
Old 12-20-2013, 08:11 PM
Watchme Watchme is offline
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Mein Auto: 2011 328i E90
battery tender jr. - used by many with good results.
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  #3  
Old 12-20-2013, 08:37 PM
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beden1 beden1 is offline
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Mein Auto: '11 E93 335is & '08 535xi
Battery Tender Plus. I use them on two cars that often get stored for several months throughout the year. Have for years without any problems.

http://www.amazon.com/Battery-Tender.../dp/B00068XCQU
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  #4  
Old 12-20-2013, 08:57 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by Lanier View Post
Hello, I am new to this forum and trying to seek an answer to the following concern. We have a 2011 328ix that will be sitting for at least 5 months next winter in a cold NJ garage. We are looking for some info how to keep the battery charged for this length of time. We have read about a trickler, thoughts and suggestions truly appreciated.
Handy w/electronics? Can make dandy DIY lead/acid 3 stage charger.

Or, CTEK's common.
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  #5  
Old 12-21-2013, 05:22 AM
roadkillrob roadkillrob is offline
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I have the battery tender plus also - been using it on my E93 every winter for almost 8 years now and still on original battery.

If I was buying new, I would also maybe look at ctek or shumacher but ultimately you want to get it on a battery maintainer for the winter months and you can buy battery tenders locally, the others you most likely will need to buy online, amazon etc.

Easiest way to hook it up is to the posts under the hood where you can boost the car.
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  #6  
Old 12-21-2013, 06:52 AM
Lanier Lanier is offline
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Location: NJ
 
Join Date: Dec 2013
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Mein Auto: 328ix
Thanks for this info. Recommendations are the Battery Tender Plus vs the CTEK. Is one preferred over another, are they about equal? We had a charger for our Porsche Carrera 911 that just plugged into the lighter, but that car was started at least once a month. No problems or issues with it. The BMW will be sitting from November until April. Again thanks
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  #7  
Old 12-22-2013, 12:18 PM
bimmertech113 bimmertech113 is offline
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Location: TN
 
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New member, battery question winter storage

Cig lighter is not really an option. Any battery maintainer with over charge protection will be fine.


Sent from BimmerApp mobile app
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  #8  
Old 12-22-2013, 05:44 PM
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fun2drive fun2drive is offline
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Location: Panhandle of Florida
 
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Mein Auto: 335 vert//M3/4/ 13Outback
You use the jump lugs under the hood to hook this up with clips or permanently mount the tender. I use BT junior in fact I have 10 of them and none have ever failed. I would just use the junior and get it from Amazon as it is cheaper. I keep mine inside the hood and have done so on my M3 for at least 10 years with no ill effects.
CTEK is a fine unit but pure overkill for my application which is just to keep my car topped off which it is now in Florida. I use them for months at a time as well and just changed my E93 battery since it would have been close to 8 years old and just didn't want to take a chance of getting stranded...
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  #9  
Old 12-24-2013, 04:52 PM
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Verts4Ever Verts4Ever is offline
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Mein Auto: 2011 E93 335i
We also use the Battery Tender Plus on our E93, although luckily we don't have to worry about winter storage any longer now that we've relocated from Denver to the Phoenix area.

OP, since you have a 2011, you might want to ask your dealer to check your battery to see if it should be replaced under a little-known recall that's apparently in effect now. It seems there was a bad batch of batteries installed during the 2011 production year, and our dealer replaced our battery for that reason.

On a side note to my fellow SmartTop users, I just took our E93 in for the second DME update under SIB 120912 (N55 idling and other issues) that requires an update to the rooftop controller module, and it seems that the SmartTop does interfere with the update even in hardware bypass mode. Long story short, the module update failed, our roof and trunk are inoperable, and I have to re-pin the wiring harness back to stock since we have an old-style non-PnP SmartTop version. I'm hoping the module isn't bricked and can be reflashed like what happened to roadkillrob a few years ago.

Last edited by Verts4Ever; 12-24-2013 at 04:53 PM.
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  #10  
Old 12-24-2013, 05:31 PM
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blue boy blue boy is offline
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Mein Auto: 2011 328ix
lanier
if you have an AGM battery get a maintainer that works with AGM batt. many chargers do not work with AGM.
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