I also have a CTEK 7002. I figure if you can jump start the car from the terminals under the hood they must be direct to the battery. The battery recondition mode works like a charm - it revived an old dead battery on my E30 convertible before I sold it.
I have had a battery explode while charging my M3 and it was not pretty. The battery cover was blown to shreds and the battery compartment was full of acid. I spent 3 hours in the middle of the night cleaning and re-cleaning the battery compartment and trunk in an attempt to prevent acid damage. I went though pounds of baking soda, thank god for 24-hour grocery stores. When battery acid and baking soda meet it's quite a show BTW.
It was an OEM battery with the vent hooked up and the charger was in the trunk, which was open thankfully. Charger was not a CTEK. Needless to say I charge from under the hood now.
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
Last edited by Yorgi; 02-21-2011 at 11:19 PM.