These Energizer Industrial 9V batteries boxed in 12 are ideal for industrial and business users needing 9V PP3 batteries in larger quantities without all the retail packaging. They offer the same performance as their retail packed partners. Perfect for smoke alarms, ideal for TV & Film, Music & Theatre. Bulk packed in a box of 12. There are 6 boxes of 12 in the outer case of 72 batteries. These long lasting Alkaline Industrial 9V Energizer batteries are equivalent to and also known as 6LR61 EN22 6AM6 MN1604 1604A. Brand new product comes with 4 year shelf life. Energizer Part Number 6LR61DP12 6LR61D12 Code 638592 636109 Battery Length : 26.5mm Battery Width : 17.5mm Battery Height : 48.5mm Box Weight : 570g Battery Voltage : 9V No Added Mercury or Cadmium