What is the standard life span of a PLB battery?

• A. 2 years
• B. 3 years
• C. 5 years
• D. 8 years

Answer: (C)

The energy source in a PLB is considered good for a finite service life, during which the device is guaranteed to perform when needed. Five years is the standard life span for a PLB battery because the lithium battery packs used in these beacons are rated for roughly five years of usable life, accounting for aging, self-discharge, and capacity loss. To ensure reliability in an emergency, manufacturers and regulators expect the battery to be replaced on this five-year cycle (often with an end-of-life indicator prompting replacement). Replacing the battery on schedule helps guarantee the beacon will transmit with sufficient power and duration if an actual distress situation occurs.