Battery/fridge question

[JRTJH]

I've used a couple of charcoal briquettes (not the self lighting ones) on a paper plate and then pour about 1/2 cup of "unused" coffee grounds (fresh before perking) on the charcoal and put it in the refrigerator, leave the door slightly ajar. Same in the freezer section if it's a 2 door unit.

[LHaven]

Originally Posted by chuckster57

Coffee grounds. Or so I’ve heard.

Yup, that was one of the ones we used, now that you brought it to mind.