My car has an alarm/immobiliser and therefore has some drain. And it's not a daily driver. So - to make sure the battery's not flat when I do want to...
I suppose knowing that in the dirt somewhere is some Senna DNA might make it extra collectible? Which is ironic since the most famous picture of him...
There's also a magnetic breakaway connector that you can purchase for the CTEK. So if you drive away and forgot to disconnect the tender cable, this...