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Old 10-15-2012, 11:04 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 avoiceoreason View Post
...And secondly, it didn't note on my paperwork what kind of battery they put in. I assume it is AGM. Is that the right assumption?
Great choice on the charger, I think it's the best one available on the market. I have the same model.

The BMW TIS (online workshop manual) mentions to never go over 12.8 volts when charging the AGM battery or you will quickly destroy the battery.

The difference between "normal mode" and "snowflake mode" on the CTEK is a charging voltage of 12.4V vs 12.7V. I think 12.7V is pushing it close to the limit so I would stick to normal mode to be safe.
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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