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Amazfit T-Rex Ultra 2 vs Polar Grit X2 Pro
The specs that matter for triathlon, side by side, from each maker’s own published figures.
| Spec | Amazfit T-Rex Ultra 2 | Polar Grit X2 Pro |
|---|---|---|
| GPS battery | 50 h | 43 h |
| Smartwatch battery | 30 days | 10 days |
| Triathlon / multisport mode | Yes | Yes |
| Onboard maps | Yes | Yes |
| Open-water GPS (our rating) | 4 / 5 | 5 / 5 |
| Weight | 89.2 g | 79 g |
| Screen | AMOLED 1.5in (480x480) | AMOLED |
| Price | ~$549.99 | 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?
Amazfit
Pick the T-Rex Ultra 2 if…
- you want the longer GPS battery: 50 h vs 43 h
- you want the longer smartwatch battery: 30 days vs 10 days
Polar
Pick the Grit X2 Pro if…
- you want better open-water GPS (our rating): 5 / 5 vs 4 / 5
- you want the lighter one: 79 g vs 89.2 g
Specs from the makers’ own pages: Amazfit, Polar.
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Triathlon Watch Comparison
Battery life, open-water GPS and maps across the watches triathletes buy.
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Triathlon watches, compared
Every product in this category in one spec table, plus 820 head-to-heads.
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