WRT the CTEK 3600 - I use one and it's great - I bought the cigar lighter adaptor cable and use that, as it's so convenient. However I did find that the plug provided was not a great fit, and tended to pop out - so ended up replacing it with a marine one (Sutars) which is MUCH better, so you could do the same with one of the provided leads and avoid paying the extra for the adaptor.
Nigel
