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Garmin Instinct 3 AMOLED (45 mm) vs Polar Vantage V3
The specs that matter for triathlon, side by side, from each maker’s own published figures.
| Spec | Garmin Instinct 3 AMOLED (45 mm) | Polar Vantage V3 |
|---|---|---|
| GPS battery | 32 h | 43 h |
| Smartwatch battery | 18 days | 10 days |
| Triathlon / multisport mode | Yes | Yes |
| Onboard maps | No | Yes |
| Open-water GPS (our rating) | 5 / 5 | 5 / 5 |
| Weight | 53 g | 57 g |
| Screen | AMOLED | AMOLED |
| Price | ~$349.99 | See retailer |
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 Instinct 3 AMOLED (45 mm) if…
- you want the longer smartwatch battery: 18 days vs 10 days
- you want the lighter one: 53 g vs 57 g
Polar
Pick the Vantage V3 if…
- you want the longer GPS battery: 43 h vs 32 h
- you want onboard maps
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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