Bowks, my charger is plugged in all of the time.

One thing that might be worth doing is this - I have a small plug that is wired in to the car permanently (MUST be fused next to the battery) and a matching plug on the charger. Saves pissing around opening the bonnet and putting clips on. The wire just pokes out of the corner of the grill.

Also, the plug will pull itself apart when I forget and drive out of the garage