The Energizer Industrial 9V PP3 batteries are economically packed in boxes of 12 making them a perfect choice for bulk users such as private and government businesses around the world, Energizer Industrial 9V PP3 batteries are perfectly suitable for general devices such as smoke alarms and other devices around the home. The Energizer Industrial 9V PP3 battery has no difference of performance in comparison to the standard Energizer 9V PP3 battery, but there is a difference in price due to the benefits of buying in bulk.