Having read the forum before buying Gibson (my Copen) I was aware that there can be issues with the battery going flat if the car isn't driven regularly, particularly in cold weather. I only collected Gibson on 25th September and drove him sixty miles back from Harrogate and then did a couple of thirty mile round trips as well as some local runs, so thought the battery would be fully charged. Last week I went away for a week, tried the engine when I got back - dead as a dodo! Jump started it OK but not keen on having to do it on a regular basis so looked at the discussion on the forum for and against solar battery trickle chargers. Did a bit of online research and quite a few people say they are worth having if you are not driving the car every day. The main issue seemed to be how they are connected as the cigarette lighter socket option only works if the socket is still live when the ignition is off, and in the Copen this is not the case. However, I found the AA Car Essentials Solar Powered Car Battery Charger on Amazon for £22.50 which connects via the OBD socket and, having established via the forum where the Copen's OBD socket is, (at the bottom of the panel under the steering wheel, just above your left foot), I decided it was worth a try. Time will tell if it does the trick!