My 2005 4/4 is kept charged using my CTEK 3600 through the cig lighter socket which is located in the glove box. Never had an issue such as blown fuse with this charging system, as it never uses a high current. My only comment is that the cig lighter adapter supplied by CTEK is not the best fit, nor is the standard socket much good (a 99p item!), and as a result the connection can come undone. I replaced both with SUTARS marine grade cig lighter socket and plug. These cost just a few £s and one other benefit is that the socket has a rubber cover, which prevents the risk of any loose metal object getting into the socket and shorting it (which happened to me).
Nigel
