[Dottore]

I have a couple of newish cars to store for 4 or 5 months. The place I want to store them has no electrical outlet, though I could run an extension cable in through a window.

Is there any fire risk in hooking up a trickle charger (unsupervised) for this length of time?

Should I take out the batteries to reduce risk?

Would just unplugging the leads (without trickle-charger) keep them alive for this length of time?

Any thoughts?