The battery inside this cartridge holds FAA TSO-C142a authorization, meaning it is manufactured and identified to meet the FAA's minimum performance standard for non-rechargeable lithium batteries used in aircraft equipment. This is what satisfies the federal requirement in 14 CFR Part 121, Appendix A that automated external defibrillators carried by covered air carriers use a TSO-compliant power source.
It's worth being precise here: a TSO authorization certifies that the article, in this case the battery, meets the FAA's standard and that the manufacturer is authorized to produce it. It is not, on its own, a separate approval to install any particular device on a particular aircraft; that installation approval is handled through your aircraft operator's own compliance process. For the purpose this product serves, meeting the power-source requirement for AED compliance, TSO-C142a authorization is exactly what's needed.
