GPS3 Watch
The battery will last for 3-4 months without using GPS.
Or up to 10 hours of GPS surf time, before it needs to be recharged. Press bottom 2 buttons together (SELECT + DOWN) to check remaining GPS surf time. Please note battery life will diminish over time.
GPS2 Watch
The battery will last for 2-3 months without using GPS.
Or up to 8 hours of GPS surf time, before it needs to be recharged. Press all 3 buttons together to check remaining GPS surf time.