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Old 01-16-2013, 08:19 PM
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Yorgi Yorgi is offline
Officially Welcomed to the 'Fest
Location: Toronto
Join Date: Mar 2005
Posts: 3,650
Mein Auto: '04 M3 / '06 650i Cab
Originally Posted by 07 E63650i View Post
Just wondering, where can I purchase a battery tender from?
You can find the CTEK on Amazon or eBay. The dealer will probably carry CTEK too. Same goes for AutoZone.

Here is a thread on smart trickle chargers.

The battery draining to zero if you take short trips is a design flaw for sure. Many people have short commutes to public transit (park daily at subway or train parking lot) and to produce a car that cannot handle this without killing the battery is a major design flaw.

I am surprised BMW gets away with the "unfavorable driver profile" line that they love to recite. This terminology is mentioned in the TIS (service manual) and it appears BMW employees are trained to blurt it out whenever there is a battery problem.
Straight lines are for fast cars...turns are for fast drivers
'04 M3 - track
'06 650i Cab - daily driver
'02 Highlander - kid hauler
'01 330Ci - winter beater

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