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E63 / E64 6 Series (2003 - 2013)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 10-24-2012, 11:40 AM
OutNSpace OutNSpace is offline
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Mein Auto: 2005 BMW 645Ci Conv
Question: OK to put car on trickle charger for winter?

I'm getting ready to put my 645 away for winter storage and have been hearing all the issues with the battery. I'd like to leave the car on a trickle charger/battery maintainer - anyone know if there are any issues with doing this?
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  #2  
Old 10-24-2012, 03:10 PM
tampamark tampamark is online now
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Mein Auto: 2006 650 convertible!!!
It is the best thing you can do for your battery in storage. Do it. Buy a quality battery maintainer, Yorgi is a fan of the Ctek brand. Search CTEK as the keyword and you will find many threads discussing this.

The BMW TIS tells you to charge through the terminals under the hood, not directly to the battery in the back.
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Old 10-24-2012, 06:06 PM
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Yorgi Yorgi is online now
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Mein Auto: '04 M3 / '06 650i Cab
I would only leave a battery connected long term to a CTEK or the re-branded "Battery Tender Plus" that BMW dealers sell. CTEK is much better quality for about the same money as the BMW unit. The 3300 goes for ~$55 and the 7002 ~$105 on Amazon.com.

Most tenders will overcharge the battery so I would not risk using a no-name trickle charger.

CTEK


Battery Tender Plus


BMW Version of Battery Tender Plus
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Last edited by Yorgi; 10-25-2012 at 04:50 PM. Reason: add prices
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Old 10-25-2012, 04:42 AM
OutNSpace OutNSpace is offline
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Location: Groton, MA
 
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Thanks for much for the replies! Getting a CTEK today.
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  #5  
Old 10-26-2012, 07:32 PM
FredoinSF FredoinSF is offline
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Location: Bay Area and Reno
 
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Mein Auto: 650i 330cic X5d MINI
Sounds like you've already decided but I will also endorse the BMW battery tenders. I have had one plugged into my e46 for ten years and the battery is still the original. I am going to be replacing the battery in the spring because it recently tested borderline but I think the tender helped with the longevity.

My e63 is driven more regularly but sometimes sits fir extended periods. It is also plugged into a BMW battery tender if it will sit for more than a week. Battery is five years old and no sign of weakness.
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Old 10-27-2012, 10:38 AM
3Pedals_6Speeds 3Pedals_6Speeds is offline
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Mein Auto: fun cars
I have a Battery Tender Plus, and can support the comment that they are very good.
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