FR2 Battery for use on US commercial airlines. This Aviation Battery meets the specifications of the four-Year Battery and the FAA TSO C-142 regulation for use on commercial aircraft. The device complies with the requirements of the Medical Device Directive, 93/42/EEC, and carries the CE-marking accordingly. Labeled with an install-by date of five years from date of manufacture. Standby Life: Four years typical when battery is installed by the install-by date. (Will power the AED in standby state within the specified standby temperature range, assuming one battery insertion test and no uses.) Available for sale in US only.