Personal beacon locator review: A long lasting lithium battery is supplied to a PLB. This battery is inactive until the PLB switch is switched on. Government rules require the transmission of PLBs with a battery class 2 (a type of compact PLB for backcountry purposes) at -20°F (-28.9°C) for 24 hours. These cold temperatures, however, are the worst scenarios and most PLBs are able to transmit in milder conditions for more than 30 hours.
If you purchase a PLB, you must register it (for free) in the NOAA SARSAT (Search and Rescue Satellite Aided Tracking) database. The distress signal from your PLB unit is then associated with vital personal information (such as name, address, emergency contact phone numbers.
And medical conditions), which can help rescuers respond faster. You must also update your data every two years, and if you sell or transfer ownership of your PLB, you must report it in this database, and the next user must register their personal data.