The G5 AED battery has a "manufactured on date" printed on it and a 5 year shelf life (new and uninstalled) from the manufactured on date. The expected expiration date is 4 years from the date you install your battery as long as you install the battery within 5 years of the manufacture date.
For use with: Cardiac Science Powerheart G5 AED models G5A-80A, G5A-80C, G5S-80A, and G5S-80C
Specifications:
For more information on AED Batteries, check out our blog post.