Put a quarter on top of a frozen cup of water in your freezer. If it's still there when you get back, you haven't lost power for a long enough time for your fro

Put a quarter on top of a frozen cup of water in your freezer. If it's still there when you get back, you haven't lost power for a long enough time for your frozen food to thaw. If it sank to the bottom of the cup, toss out all the food.