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Old 01-05-2013, 05:25 PM
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Yorgi Yorgi is offline
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Location: Toronto
Join Date: Mar 2005
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Mein Auto: '04 M3 / '06 650i Cab
Originally Posted by Nitrogen View Post

What do you mean by registering your battery? If you put in a battery will it not work? I've done it before with no problems. Thanks
The car keeps track of the age of the battery and changes the charging voltage as the battery ages. This helps get more life out of the battery.

If you install a new battery without registering it (ie resetting the battery age clock to zero in the cars main computer) then the car will be charging your new battery with a voltage that is too high, and this will shorten the life of the new battery.
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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