Originally Posted by mthomas
Sorry for your misfortune, hopefully others can learn from it. There are a lot of threads here about " i changed my battery and did not register it, and it works fine". Unfortunately you got stung and learned first hand what can happen when a battery is not charged properly. Registering the battery is about telling the charger what kind of battery is installed (wet, AGM,etc), and what stage of life the battery is in so that overcharging does not occur.
I know its a long post, but my hope is that members on this forum will read it, learn from my misfortune and not have the same thing happen to their cars. Again, having changed plenty of batteries on different makes of bmw's in the past, this is a first for me.