We recommend removing the Astroskin to have it placed in a bin before passing through the metal detector during the security check at the airport (just like for a watch, paper, laptop and all other items in your pockets).
Additionally, not all airlines allow alkaline batteries (e.g. AAA, AA, C, D, 9-volt, etc.) carried in checked baggage. Please consult your airline for more information. Rules varies from country to country.