GPS Watch Battery Calculator — Will Your Watch Last?
Estimate your GPS watch battery life for your planned run or race.
How We Calculate This
Battery Life Estimation
Battery life depends on the GPS mode and the watch specifications:
Remaining Hours = (Max Battery x Mode Multiplier x Current %) / 100
Standard GPS = 1.0x, Multi-GNSS = 0.7x (uses more power), UltraTrac = 2.5x (uses less power with reduced recording frequency).
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates. Always consult a coach or medical professional for personalised training advice.