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Old 01-17-2013, 12:52 AM
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645/333 645/333 is offline
Location: uk
Join Date: Jun 2010
Posts: 1,621
Mein Auto: BMW 640i SE Convertible
Originally Posted by colink View Post
"Just wondering, where can I purchase a battery tender from? "

I believe the one that is available from BMW is made by these folks. I have a the CTEK Multi US 3300 .

They also sell a comfort indicator with eyelets that can be connected to the terminals under the hood permanently and simplifies hook-up.

I think it will still require you to pop the hood because the leads are not long enough to reach the radiator grill.
Hi ! I bought a CTEK 7000 and connect it in the boot where the battery is, via a hard wire with plug and socket, I did some pics in a previous thread on the subject, very easy and I could close the boot as the power cable quite thin. Did not have an issue with ventilation as the CTEK charges in a different way,ie intelligent charger, but common sense even then says make sure the vent is clear etc..

Always said I would go back to a 6 series
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