I think I already know the inevitable answer to this question so here goes nothing... 7 is garaged, without any auxiliary power, and driven every few weeks. Alarm fitted but no battery isolator. Over the winter the car has refused to start and all that happens on start-up is a fast clicking sound or nothing at all. Battery 'appeared' flat so purchased a small, lithium, portable, powerpack, which did the trick (it works every time). Repeat all the above every few weeks. NB: The battery is topped up as per. So, the clicking is the solenoid I presume, with insufficient juice to turn the engine etc? The battery is not even charging up on long runs - I have to carry the portable to re-start at refueling stops! I have now (for 3 days) had it connected up to the ex-Carcoon charger/conditioner but it is only showing about 11 volts max across the terminals at rest and about 13.5 when connected to the charger. Is the Banner goosed??