Improve your chances, tip # 2

Put a few plastic bottles of water in your freezer when it isn't completely full (leave about three inches empty at the top of each one). This gives several additional hours of food safety in a blackout. If you also put a baggy of ice cubes in there, you will know if the stored food might be dangerous when the freezer kicks back on (the cubes will have melted and refrozen into a shapeless mass).