This Zoll 8000-0807-01 Type 123 Duracell lithium battery set is a perfect companion to your AED Plus unit! The batteries are an important part of your AED and they give it the power needed to administer shocks to a patient. This battery set contains enough Duracell lithium Type 123 batteries to replace the ones in your AED Plus unit, making upkeep cheaper and more convenient than the expensive, proprietary battery packs some other AEDs use. It’s also a good idea to keep a set of spare batteries onhand so that you are ready to replace them when the AED is used or the current batteries expire. These batteries have a 5-year life.