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Old 01-15-2013, 06:58 AM
HPIA4v2 HPIA4v2 is offline
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Join Date: Mar 2006
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Mein Auto: E60, E71, E92
Originally Posted by bimmerworld View Post
I have still the same old battery. There are no red lights with the old one. I will check the voltage and see how soon I should change it. Will let you know if I have any problems after replacement.
If you stick with the same type of battery (ole style lead-acid not AGM type), you are unlikely gaining anything by registering the new batt to the car. Registering reset the charging profile, gentler when the batt is newer then more agressive as the batt aged. AGM batt more sensitive to charging profile and need to be charge at lower current than typical lead-acid batt, that's why you need to reset that charging profile when replacing AGM batt.

I register and re-program my 2008 E60 535i when I switched from regular lead-acid to AGM.
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