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Key Highlights
- Amazfit T-Rex Dual Solar features solar charging on both the front and rear
- 660mAh battery offers up to 25 days of typical use without solar assistance
- Three hours of daily front-side sunlight can extend claimed battery life to 34 days
- Rear solar charging can extend typical use to up to 51 days under Amazfit’s specified conditions
- 1.32-inch AMOLED display with 3,000 nits peak brightness and sapphire glass
- Grade 5 titanium bezel and buttons with 10 ATM water resistanceSupports 180+ workout modes, dual-band GPS, offline maps and recreational diving
Amazfit has launched the T-Rex Dual Solar, a rugged smartwatch designed for extended outdoor adventures with a feature that sets it apart from most AMOLED watches: solar charging from both sides of the watch.
The watch combines a solar-capable AMOLED display with a larger solar charging surface integrated into the glass-ceramic rear panel. Amazfit says the system can supplement the 660mAh battery during outdoor use, reducing the need for conventional charging on longer trips.
The T-Rex Dual Solar is aimed primarily at hikers, trekkers, expedition users and athletes who spend extended periods away from power outlets. Its other major features include offline maps, dual-band GPS, more than 180 workout modes, a built-in flashlight and 10 ATM water resistance.
The Amazfit T-Rex Dual Solar is an expedition-focused smartwatch that combines an AMOLED display and premium rugged construction with dual-sided solar charging to extend time away from a power outlet.
| Feature | Details |
|---|---|
| Brand | Amazfit |
| Model | T-Rex Dual Solar |
| Display | 1.32-inch AMOLED |
| Resolution | 466 × 466 pixels |
| Peak Brightness | Up to 3,000 nits |
| Protection | Sapphire glass |
| Bezel & Buttons | Grade 5 titanium |
| Rear Panel | Glass ceramic |
| Battery | 660mAh |
| Typical Battery Life | Up to 25 days |
| Front Solar | Up to 34 days with 3 hours daily exposure |
| Rear Solar | Up to 51 days with 3 hours daily exposure |
| Accuracy GPS Mode | Up to 41 hours |
| Water Resistance | 10 ATM |
| Diving | Recreational diving support |
| Workout Modes | 180+ |
| GPS | Dual-band, six satellite systems |
| Bluetooth | Bluetooth 5.3 |
| Wi-Fi | 2.4GHz |
| Compatibility | Android 7.0+, iOS 14.0+ |
| Strap | Silicone, 26mm quick release |
| Weight | 69g without strap |
| Case Diameter | 51.4mm |
| Price | $649.99 |
| Colour | Basalt Black |
Design & Build
The Amazfit T-Rex Dual Solar is a large outdoor smartwatch, measuring 51.4mm across and 16.9mm thick including the heart-rate sensor. The watch itself weighs about 69g before the strap is added.
Amazfit uses a Grade 5 titanium bezel and buttons, sapphire glass over the display and a glass-ceramic rear panel. The combination is designed for users who expect the watch to withstand demanding outdoor environments rather than simply function as an everyday smartwatch.
The large case also leaves room for a dedicated LED flashlight, which provides white and red lighting. That can be useful when navigating a campsite, checking equipment or moving around in low-light conditions.
The watch carries a 10 ATM water-resistance rating and supports diving-related activities. Amazfit’s official regional specifications should be checked for the exact diving depth and certification applicable to the market.
Display
The T-Rex Dual Solar has a 1.32-inch AMOLED display with a 466 × 466 resolution and up to 3,000 nits peak brightness.
The AMOLED panel provides the high contrast and colour output expected from a modern smartwatch, while the high brightness rating is particularly relevant for outdoor use.
Sapphire glass protects the display against scratches, which is useful for a watch designed around hiking, trekking and other activities where contact with rocks, equipment or rough surfaces is possible.
The display is also part of Amazfit’s solar-charging system. The front surface can collect solar energy while the watch is being worn outdoors.
Dual-Sided Solar Charging
The main reason the Amazfit T-Rex Dual Solar exists is its two-sided solar charging system.
Amazfit places solar collection technology behind the front display and incorporates a substantially larger solar collection area into the glass-ceramic back.
In Amazfit’s specified test conditions, the 660mAh battery is rated for:
- Up to 25 days of typical use without solar charging
- Up to 34 days with three hours of daily front-side solar exposure
- Up to 51 days with three hours of daily rear-side solar exposure
The solar figures are based on exposure to sunlight at around 50,000 lux, so they should not be interpreted as guaranteed everyday battery life. Actual results will vary with brightness, GPS use, notifications, workouts, temperature and available sunlight. Amazfit also notes that solar charging supplements the battery rather than replacing conventional charging.
The rear panel is particularly interesting for multi-day trips. Because the back of the watch normally sits against the wrist, users can remove the watch and expose its rear solar surface to sunlight when stopped.
Amazfit also provides Outdoor Extreme and Expedition modes designed to reduce power consumption during longer trips.
Health & Fitness Tracking
The T-Rex Dual Solar supports more than 180 workout modes and includes health tracking for heart rate, blood oxygen, stress, skin temperature, sleep, heart-rate variability and breathing quality.
The watch also supports training tools through the Zepp ecosystem, including structured training plans and integrations with services such as Strava, TrainingPeaks, Runna and Google Fit.
These features make the T-Rex Dual Solar more than a simple expedition navigation device, although its large case and rugged design clearly favour outdoor users.
GPS & Navigation
Navigation is another major part of the T-Rex Dual Solar package.
The watch supports dual-band GPS and six satellite positioning systems. It includes preloaded colour maps, downloadable contour and ski-resort maps, turn-by-turn navigation, route planning, waypoint navigation and points-of-interest search.
Amazfit also includes a Navigation Gradient Curve, which uses colour coding to show upcoming climbs and descents along a route.
The LiveShare feature can share real-time location and activity information, giving friends or family a way to follow someone’s progress during an outdoor activity.
For users spending days on trails, offline mapping is particularly important because it reduces dependence on a constant smartphone connection.
Battery & Charging
The T-Rex Dual Solar uses a 660mAh battery.
Amazfit rates it for up to 25 days of typical use, while Accuracy GPS Mode is rated for up to 41 hours. Solar exposure can extend these figures under the company’s specified testing conditions.
The watch also offers power-saving modes for longer expeditions. The key advantage is therefore not simply a large battery, but the ability to continuously replenish some of the consumed energy when suitable sunlight is available.
However, heavy GPS tracking, frequent screen use and other demanding functions will reduce endurance considerably compared with the typical-use figure.
Smart Features & Connectivity
The T-Rex Dual Solar supports Bluetooth 5.3, 2.4GHz Wi-Fi and Bluetooth calling through its built-in microphone and speaker.
It works with Android 7.0 and newer devices and iPhones running iOS 14.0 or later through the Zepp app.
The watch also supports Zepp Flow, podcast storage and integrations with third-party fitness platforms.
Price & Availability
The Amazfit T-Rex Dual Solar is priced at $649.99 (~Rs.62,400) in the US and is available through Amazfit’s official US store.
Amazfit also lists the watch in Europe, including a UK price of £649.90(~Rs.82,400). The European product page currently lists an expected shipping timeframe of mid-October.
The watch is offered in Basalt Black with a silicone strap.
Amazfit has not announced an official India price or India launch date at the time of writing.
Competition & Alternatives
The Amazfit T-Rex Dual Solar enters a higher-priced outdoor-watch segment where buyers can also consider Garmin and other premium sports watches.
| Alternative | Why Consider It? | T-Rex Dual Solar Difference |
|---|---|---|
| Garmin Fenix series | Mature outdoor training and navigation ecosystem | AMOLED display plus dual-sided solar charging |
| Amazfit T-Rex Ultra 2 | Rugged design and long battery life | Dual solar charging and newer feature set |
| Amazfit T-Rex 3 Pro | Rugged construction with AMOLED | T-Rex Dual Solar adds front and rear solar charging |
The biggest question for buyers is therefore whether dual-sided solar charging and the T-Rex Dual Solar’s navigation package justify its $649.99 price.
Final Verdict: Should You Buy the Amazfit T-Rex Dual Solar?
The Amazfit T-Rex Dual Solar is designed for a fairly specific type of user: someone who spends significant time outdoors and values long periods away from conventional charging.
Its defining feature is the dual-sided solar system. The front solar surface can collect energy while the watch is being worn, while the larger rear panel can be deliberately exposed to sunlight when the watch is removed. Combined with a 660mAh battery, this gives Amazfit unusually long claimed endurance for an AMOLED-based smartwatch.
The watch also has the hardware expected from a premium outdoor model, including sapphire glass, titanium components, dual-band GPS, offline maps, 10 ATM water resistance and extensive workout tracking.
Best for: Hikers, trekkers, expedition users, endurance athletes and people who regularly spend several days outdoors.
Consider alternatives if: You want a smaller smartwatch, don’t spend much time outdoors or primarily need everyday smartwatch functions.
Bottom line: The T-Rex Dual Solar’s value comes from its combination of AMOLED technology and solar endurance. The headline 51-day figure is based on specific sunlight conditions rather than normal use, but the underlying dual-sided charging system is genuinely unusual and could be useful on extended outdoor trips.
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