Thread: 2008 Battery
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      11-08-2012, 11:28 AM   #12
Private First Class

Drives: 2008 E90 M3
Join Date: Aug 2008
Location: Sugar Land, Texas

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Originally Posted by jlee View Post
why do you need to "register" a battery ?

sorry, strangely I've never heard of this ?
The battery has to be registered to the car because there is some algorithm how much it gets charged depending on the age and condition of the battery. For example when the battery is new the car charges it a certain way and as it depletes with age the car changes the charging to it, therefore you need to 'register' a new battery so it doesn't kill the new one.
Originally Posted by elm3 View Post
You really need a battery tender then, if your car sits that long without driving it. I have one, since my car is not a DD.
yea i have a ctek 3300 being delivered today.