I decided to look into methods of 'tricle' charging the vehicle battery in my Hobby. The battery is very sound, and well maintained, but the alarm, whilst only using milliamps, and the forthcoming frost will take their toll, and I don't like disconnecting the battery to give it a conditioning charge, because it means re-setting the alarm. I rang several sources, ie Fiat, Lowndhams, and Viper alrams, and all said that a solar charger with an output of around 2 amps connected permanently to the battery would keep the batter in tip top condition through the winter. I don't expect an output of 2 amps, less than half is realistic, but given that they are apparently designed to work, even when cloudy, 1amp for 4 or 5 hours a day will keep the battery nicely topped up. They can be bought for around £20, so it seems like a no brainer. Does anybody have any real experience of these devices?? Thanks.