Basically not recommended to leave it more than a few days without a battery conditioner.
Could this also explain why my headlights dim when I use the electric windows?
On the DP tour, with Walshy and I holding the 'up' buttons on the leccy windows the lights were almost completely off!
(with stereo, satnav, fan also on).
btw on one of the Braille homepages is that a picture of Nipper's Elise, snow drifting in the GP carpark on our ill-fated snowy 'Ring trip?