Note how as time passes, the difference between the price of a battery and a tankful of fuel has shrunk. So I'm erring towards replacing the battery in my Roadster Ser2. It is garaged, and I have been using a Ctek charger/maintainer since buying one in August (to follow the Owners Manual guidance to keep it on a charger if the car isn't used for more than a week). My understanding is that it is intended to be left on once the battery is fully charged. I was out in the car a week or so ago, and on coming home put it back on the Ctek in anticipation of the onset of winter. Within a few hours it was showing fully charged again. However yesterday, having had the first two amber lights on for about 10 hours (overnight), the red error light came on. So I've turned everything off until I can be sure this means the battery has had it (it is possibly 6 or more years old), or perhaps the charger is faulty. Any ideas ??
I have known that to happen if a good contact is not being made, especially if you are charging via the cigarette lighter socket.
