ENERGIZER CR2032 LITHIUM COIN BATTERIES: This 4-pack provides is our #1 longest lasting & provides reliable power for your specialty devices. WORLD'S FIRST 3-IN-1 CHILD SHIELD TECHNOLOGY: Featuring three lines of defense: Colour Alert, a bitter coating, and child-resistant packaging. COLOUR ALERT: Colour Alert technology dyes the mouth blue seconds after contact with saliva to indicate possible ingestion. BITTER COATING: Non-toxic bitter coating on each battery helps discourage ingestion. CHILD RESISTANT-PACKAGING: Child-resistant packaging serves as the first layer of protection. RECOMMENDED DEVICES: Compatible for the use in Apple AirTags, as well as other electronics such as Car Key Fobs, Watches, Toys, Games, Home & Medical Devices, Fitness Accessories and more. STORAGE: CR 2032 3V button cells remain fresh in their packaging for up to 12 years in storage and can withstand a wide temperature range from -22º to 140º C, ensuring you have the power when you need it most.