I run a jumper cable from the car to the ground and then place the battery on a brick or in a clay pot. I'm not all that concerned about fires since I don't push my batteries either, but I want something that will contain the fire if there is one.

Now HeliTB, you said, "You make a $500+ investment and skim on batteries" as a justification for not taking safety precautions. How's this argument, "You make a $200,000 investment and skim on safety?" I figure the chances of a fire are fairly low, but the disaster potential is huge. I don't feel like buring down the house and everyone in it because I was too foolish to put my battery in a $10.00 clay pot outside while I charged it.