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Garmin Fenix 8 (47mm) vs Polar Vantage V3
The specs that matter for triathlon, side by side, from each maker’s own published figures.
| Spec | Garmin Fenix 8 (47mm) | Polar Vantage V3 |
|---|---|---|
| GPS battery | 47 h | 43 h |
| Smartwatch battery | 16 days | 10 days |
| Triathlon / multisport mode | Yes | Yes |
| Onboard maps | Yes | Yes |
| Open-water GPS (our rating) | 5 / 5 | 5 / 5 |
| Weight | 80 g | 57 g |
| Screen | AMOLED | AMOLED |
Open-water GPS is our 1–5 rating from the satellite systems each maker lists: multi-band receivers score 5. Everything else is the maker’s own figure.
Which should you pick?
Garmin
Pick the Fenix 8 (47mm) if…
- you want the longer GPS battery: 47 h vs 43 h
- you want the longer smartwatch battery: 16 days vs 10 days
Specs from the makers’ own pages: Garmin, Polar.
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Triathlon Watch Comparison
Battery life, open-water GPS and maps across the watches triathletes buy.
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Every product in this category in one spec table, plus 435 head-to-heads.
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