Garmin makes the Fenix 6 in three different sizes, and each comes with a choice of lens materials. The Fenix 6S has the smallest diameter of the three models; the Fenix 6 sits in the middle of the three watches; and the Fenix 6X tops the lineup. Each watch has a Pro and Sapphire model, which gives you a choice between a durable Corning Gorilla Glass 3 or sapphire crystal lens.
The major difference in the three sizes is the battery life. In GPS mode alone, the watches get up to:
- Fenix 6S: 25 hours
- Fenix 6: 36 hours
- Fenix 6X: 60 hours
But each watch has different modes that can extend the battery life. The most efficient mode in the 6S can get up to 34 days, and the 6X can run up to 80 days, according to Garmin.
In our Garmin Fenix 6 review, our tester squeezed nearly three weeks of regular training and use out of a single charge. Obviously, battery life will be short if you ramp up your training or use more features, but we're confident the Fenix 6 has enough battery life for just about any adventure you can dream up.
Durability
Both the Fenix 6 Pro and Fenix 6 Sapphire models give you durability for your wildest adventures.
A rugged stainless steel or Diamond-Like Carbon-coated steel bezel paired with either of the lens options will stand up to the stress that comes with unexpected weather and wilderness treks. Plus, the 10 ATM water rating means it can withstand water pressures of up to 100m—so it'll easily handle any surprise storm or swan dive you can throw at it.
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