Amazfit T-Rex Ultra 2 review: flagship battery life at a fraction of Garmin’s price

Amazfit has been steadily building its wearable portfolio and fan base over the past few years, using the tried-and-tested method of offering a close approximation of the Garmin experience for a lot less cash.

The new T-Rex Ultra 2, the brand’s flagship outdoor smartwatch, follows the same formula, aiming to offer an alternative to the likes of Garmin Fenix 8 and Fenix 8 Pro with its offline maps, a built-in flashlight and a ridiculously long battery life.

The new wearable is an updated version of the recently launched Amazfit T-Rex 3 Pro, which was also a somewhat more affordable rival to Garmin’s Fenix line of rugged watches. While neither offers anything revolutionary over the Garmin, it’s hard – if not impossible – to dismiss the appeal of a Garmin-like experience without the hefty price tag.

Is the T-Rex Ultra 2 any better than the already excellent T-Rex 3 Pro? What are the watch’s shortcomings over the Fenix 8 and Fenix 8 Pro, if any? I’ve been testing the watch for the last two weeks, and I think I know the answers.

Amazfit T-Rex Ultra 2 review

Price and availability

The T-Rex Ultra 2 was launched on 19 February 2026 and is available to buy now at Amazfit and Amazon for $549.99. It’s $150 more than the T-Rex 3 Pro, but less than half the price of the 51 mm Garmin Fenix 8. I expect the asking price to drop later in 2026, maybe around Black Friday. That said, $550 for what the T-Rex 2 Pro has to offer doesn’t feel excessive, especially considering that the Adizero Adios Pro Evo 2 running shoes cost $500.

Design and build quality

The Amazfit T-Rex Ultra 2 is built as a large watch, measuring 51 × 51 × 14.3 mm and weighing 89.2 g with the strap attached (15g heavier than its predecessor).

The case itself uses fibre-reinforced polymer, while the bezel, buttons, and back panel are all made from Grade 5 titanium, an upgrade from the T-Rex 3 Pro, which has a polymer back. Protection comes from a sapphire crystal screen, and the watch carries a 10 ATM water-resistance rating alongside a military-grade construction and dual diving certification.

Up front, the Ultra 2 features a 1.5-inch AMOLED touchscreen display with a 480 × 480 resolution, a pixel density of 322 ppi, and a peak brightness of 3,000 nits. Compared to the 51 mm Garmin Fenix 8, the T-Rex Ultra 2 has a larger, higher-resolution screen (1.14” and 454 x 454 pixels, respectively).

Battery life is driven by a sizeable 870 mAh cell, with Amazfit quoting up to 30 days of typical use and up to 50 hours of high-accuracy GPS tracking. More on this below.

Under the hood, the Ultra 2 is equipped with the BioTracker 6.0 PPG biometric sensor, the same found on the back of the T-Rex 3 Pro. The watch also features a full suite of environmental and motion sensors, including an accelerometer, gyroscope, geomagnetic sensor, barometric altimeter, ambient light sensor, and temperature sensor.

For navigation, it supports dual-band GNSS with six satellite systems and uses a circularly polarised GPS antenna to improve signal reliability. The T-Rex 3 Pro has essentially the same positioning hardware and navigation foundation, including dual-band GNSS, six satellite systems, and a circularly polarised GPS antenna.

Connectivity includes Bluetooth 5.2, BLE, and 2.4 GHz Wi-Fi, while onboard hardware features a built-in speaker, microphone, linear vibration motor, and flashlight.

This latter feature differs from both the T-Rex 3 Pro and the Garmin Fenix series, as it offers a green light option rather than a red light. According to Amazfit, the green light is better suited for specific outdoor scenarios, such as night activities and hunting.

Storage is generous at 64 GB total, with around 30 GB available to users, leaving plenty of room for maps and activity data. The watch ships with a 26 mm silicone strap (vs 22 mm strap found on the T-Rex 3 Pro) designed to fit wrists between 145 and 215 mm, secured with a classic pin buckle.

Features (incl. maps)

The Ultra 2 doesn’t radically reinvent the T-Rex platform, but it aims to push the navigation and outdoor software further. The biggest change is the mapping experience, with global base maps preloaded and smoother on-device navigation, including improved route handling, more responsive map rotation, and longer offline route planning distances.

The watch also introduces more accurate turn-by-turn prompts, smarter climb segmentation similar to features seen on higher-end sports smartwatches, and richer map detail. These upgrades don’t change the core capability – the T-Rex 3 Pro already supports offline maps and routing – but they make the experience more polished and practical for real-world use.

It’s worth noting that the T-Rex Ultra 2 comes preloaded only with a global base map (terrain map). Contour and ski resort maps are not included and must be downloaded from the Zepp app. At the time of writing, the maps feature was still under development, with Amazfit saying broader availability via the App Map Download List is expected in March 2026.

Another subtle shift is the expansion of on-device functionality. The Ultra 2 adds features like voice memos during workouts and more advanced pace metrics (such as grade-adjusted pace), giving athletes more contextual data directly on the watch.

As the brand’s flagship product, the T-Rex Ultra 2 offers a range of health and fitness features, including BioCharge (Amazfit’s take on Garmin’s Body Battery feature), stress and sleep tracking (including sleep stages and a sleep score), heart rate and blood oxygen monitoring, HRV tracking, VO2 max and training load estimations, and more.

It can also track over 180 sports modes (I doubt most people will use more than a handful). Since Amazfit has been a Hyrox partner for years, the T-Rex Ultra 2 offers dedicated Hyrox race and training modes, as well as diving options, indoor and outdoor workouts, and snow sports.

The watch offers a “One-tap measurement” feature, which checks most of your vitals in 45 seconds, similar to Huawei’s watches, such as the Watch GT 6 Pro and the Huawei Watch 5. The T-Rex Ultra 2 also tracks what Fitbit/Google Active Zone Minutes (Amazfit calls it PAI) throughout the day, even if you don’t actively track workouts.

On top of all this, you also get features like “Jet Lag Manager” and “Meditation,” rounding out the incredible list of applications the Amazfit flagship has to offer. Even though none of these is exclusive to the T-Rex Ultra 2 (apart from the refined mapping, as far as I know), it’s hard to complain about having so many health and fitness features to choose from.

Battery life and charging

Battery life is where the Amazfit T-Rex Ultra 2 really shines, and in this regard, I might be better off comparing it with battery life bruisers such as the Garmin Enduro 3.

The official battery life is up to 30 days in smartwatch mode and up to 50 hours in high-accuracy GPS mode. It’s not quite the Enduro 3’s 36 days / 60 hours combo, but that watch has a memory-in-pixel display and not an AMOLED panel with 3,000 nits of maximum brightness.

I’ve been using the T-Rex Ultra 2 for two weeks, and it consumes around 4 per cent of battery life per 24 hours (about 1 per cent for sleep tracking). Using GPS often will understandably reduce battery life, but even with frequent training, I’d say the watch could last 2.5 to 3 weeks on a single charge.

It’s currently on 22 per cent, so I haven’t charged it since I activated it two weeks ago. The T-Rex Ultra 2 is the kind of watch that you won’t have any battery anxiety with. I looked at it this morning and saw there was over 20% battery left, and I knew I had days left before I had to connect it to the charger.

Verdict

Is the T-Rex Ultra 2 worth roughly $150 more than the T-Rex 3 Pro? The short answer is yes, but only if you plan to use its expedition-focused features. If you’re simply after a rugged watch for everyday training and general outdoor use, the extra cost is harder to justify.

From a hardware perspective, the Ultra 2 is clearly the true flagship of the T-Rex lineup. It introduces a larger 870 mAh battery for longer endurance, a titanium case back, and a bigger, heavier chassis paired with a wider strap for added stability.

Storage is also significantly expanded to 64 GB (with around 30 GB of useful space), enabling more onboard maps, while navigation is enhanced with preloaded global mapping and longer on-device route planning.

In practical terms, these upgrades translate into better multi-day autonomy, smoother mapping – in short, a watch that feels more at home on extended adventures. If your use case leans heavily on offline navigation or sustained GPS tracking, the additional $150 is fairly easy to justify.

That said, the T-Rex 3 Pro already delivers the core experience most people need. It shares the same rugged design ethos, offers an AMOLED display, dual-band GNSS, strong battery life, and comprehensive health tracking.

For runners, gym-goers, and casual outdoor users, the day-to-day experience will feel very similar between the two models. The Ultra 2 asks you to pay extra primarily for greater endurance and a more premium build rather than a fundamentally different feature set.

Compare the watch with the Garmins, and it’s clear to see the value-for-money proposition Amazfit offers with its wearables. The T-Rex Ultra 2 is miles cheaper than the Fenix 8 and the Enduro 3, yet offers almost the same feature set, battery life and physical specs.

That said, it doesn’t offer anything unique, and the mapping experience still isn’t on par with Garmin; however, it’s getting ever so close. The T-Rex Ultra 2 is certainly worth a look, as long as you have big enough wrists to support the size and heft of the watch.