Garmin Enduro 4 offers longer battery life and a lighter build than the Fenix 9 Pro

Garmin has launched the Enduro 4, a large outdoor sports watch and an update to the Enduro 3. Two reviews, from Tom's Guide and Trusted Reviews, present it as a cheaper and lighter option than the Fenix 9 Pro. It launched in October 2026 at $899 in the United States and £799 in the United Kingdom. Both reviewers focus on battery life and endurance tracking rather than the extra smart features found on the Fenix line.

The Enduro 3 kept the same US launch price, but Tom's Guide reports it now sells for £699 in the UK and $799 in the US. The Enduro 4 is also cheaper than the Fenix 9 Pro Solar, a memory-in-pixel model that starts at $1,099. Tom's Guide notes that the Enduro 3 receives most of the same new features through software updates and has a similar design and battery life.

The case measures 51mm and uses the familiar five-button layout. Tom's Guide describes a mostly plastic body with a titanium bezel and a sapphire lens. Trusted Reviews calls the case fibre-based polymer with a titanium bezel. Both say it is lighter than the Fenix 9 Pro. Trusted Reviews puts the gap at 10 to 20 grams, depending on the band fitted to the Fenix, and 33 grams against the 51mm Fenix. The display is memory-in-pixel. Tom's Guide finds it readable in most conditions but dimmer than AMOLED watches indoors or under trees, and Trusted Reviews finds it hard to see in dim light.

The watch is rated 10 ATM and is waterproof, but it is not dive-proof like the Fenix 9. It has a built-in flashlight with four white levels and a red mode. It has no microphone or speaker, and Trusted Reviews says its alerts are simple beeps. There is no LTE, satellite connection or calls from the wrist. At launch it comes in only one size and one colour.

Compared with the Enduro 3, the new model has more RAM, a faster processor for maps and 64GB of storage instead of 32GB. It ships with Garmin's new ComfortFit band, which Tom's Guide prefers to the UltraFit band of the older watch. The heart rate sensor is the Elevate Gen 5 unit also used in the Fenix 9 series.

Sports modes include the rucking and rowing modes first added to the Fenix 9, plus an updated stamina feature that estimates remaining energy in endurance efforts. Training analysis includes running economy estimates when paired with the HRM 600 chest strap, as well as endurance and hill-running ratings. Tom's Guide found the multi-band GPS accurate in suburbs, city centres and under tree cover. The optical heart rate sensor lagged behind a chest strap during intervals and sometimes gave errors early in cold-weather runs, so a chest strap gives more reliable readings.

Battery life is the main selling point. The listed figures are 30 days in watch mode and up to 90 days in sunny conditions. GPS in the most accurate mode lasts 60 hours, or 90 hours with solar. Regular GPS lasts 120 hours, or 320 hours with solar. Tom's Guide lasted 16 days on its first charge, but testing was mostly in cloudy weather, so the solar panel added little. Trusted Reviews reports close to a month between charges. Tom's Guide says the Enduro 3 matches this figure, and other solar watches such as the Garmin Instinct 3 Solar and Coros Vertix 2S also come close.

Still unknown: the sources give prices only for the US and UK, and they do not say how the watch holds up under heavy use over several years. Readers should also check whether they need the wrist calls, LTE or speaker that the Enduro 4 leaves out.