What is the normal life span of the PLB battery?

• A. 2 years
• B. 5 years
• C. 10 years
• D. 1 year

Answer: (B)

The main idea here is how long the PLB’s battery is reliably capable of delivering a distress signal. PLBs are built with a defined service life for the battery, chosen to balance reliability, storage stability, and cost. Over time, even when not used, the chemical components age and the battery’s ability to deliver peak power degrades. To ensure the beacon will function properly in an emergency, manufacturers specify a multi-year interval for battery replacement. That’s why the normal life span is described as several years and why you should replace the battery by its expiration date or at the end of its recommended service life. Checking the device label for the date and adhering to the manufacturer’s replacement schedule keeps the beacon ready when needed. Shorter lifespans would demand more frequent changes and higher maintenance risk, while longer lifespans aren’t guaranteed due to aging; the specified interval is chosen to ensure readiness and reliability.