Imagine you are several days into a long trek. Your smartphone battery is dead, the power bank has no charge left, but the watch on your wrist is still working and showing the route. That is exactly the kind of situation the new Amazfit T-Rex Dual Solar is designed for.
Launched globally on September 22, 2026, the Amazfit T-Rex Dual Solar is claimed to be the first AMOLED smartwatch capable of collecting solar energy from both the front display and the rear of the watch.
It is mainly aimed at trekkers, endurance athletes, campers, divers and people who regularly spend several days away from a charging point.
Table of contents
- What Makes a Solar Smartwatch Different?
- How Dual-Sided Solar Charging Works
- Amazfit T-Rex Dual Solar Battery Life
- Amazfit T-Rex Dual Solar Specifications
- Designed for Harsh Outdoor Conditions
- Offline Maps and Navigation
- Training Features for Athletes
- Everyday Smartwatch Features
- Amazfit T-Rex Dual Solar vs T-Rex Ultra 2 vs T-Rex 3 Pro
- Amazfit T-Rex Dual Solar Price and India Availability
- Useful Accessories for the Amazfit T-Rex
- Who Is the Amazfit T-Rex Dual Solar For?
What Makes a Solar Smartwatch Different?
Solar-powered watches are not new. Brands such as Casio and Garmin have been using solar technology for years.
However, many traditional solar watches use simpler displays because colourful smartwatch screens consume much more power.
An AMOLED display is bright, colourful and offers excellent contrast because individual pixels produce their own light. The downside is higher power consumption.
The Amazfit T-Rex Dual Solar tries to solve this problem by using solar charging surfaces on both sides of the watch.
The front display can collect solar energy while you are wearing the watch. The rear section uses a larger solar charging area built into the glass-ceramic back plate.
According to Amazfit, the rear charging surface provides more than twice the active solar charging area compared with the front.
How Dual-Sided Solar Charging Works
The two solar charging areas are designed to work in different situations.
While you are walking or trekking, the front of the watch remains exposed to sunlight and slowly adds energy to the battery.
When you stop for lunch, take a break or set up camp, the watch can be removed and placed with its back facing the sun. This allows the larger rear solar panel to collect more energy.
Amazfit even suggests attaching the watch to a backpack or tent during longer stops.
There is a dedicated Solar Priority Mode for situations where you want to maximise off-wrist solar charging.
One particularly interesting feature is solar recovery. Amazfit says sunlight can help restart a completely discharged watch.
For someone travelling through remote areas without electricity, getting access to maps and navigation again without a traditional charger could be very useful.
Amazfit T-Rex Dual Solar Battery Life
Battery life depends heavily on how much sunlight the watch receives.
Amazfit’s solar battery testing is based on around 3 hours of sunlight per day at 50,000 lux. Lux is simply a measurement of light brightness, and 50,000 lux represents bright outdoor daylight.
| Usage Scenario | Amazfit T-Rex Dual Solar Battery Life |
|---|---|
| Typical use without solar | Up to 25 days |
| Typical use + 3 hours front solar | Up to 34 days |
| Typical use + 3 hours rear solar | Up to 51 days |
| Accuracy GPS Mode | Up to 41 hours |
| Outdoor Extreme Mode without solar | Up to 40 days |
| Outdoor Extreme Mode + continuous rear solar | Up to 180 days |
The impressive 180-day battery figure comes with an important condition. It applies to the Outdoor Extreme Mode with only essential outdoor features running and continuous sunlight reaching the rear solar charging panel.
For normal smartwatch use, battery life should be closer to the claimed 25 to 51 days, depending on solar exposure.
The watch packs a 660mAh battery.
There is also a new Expedition activity mode, designed for multi-day adventures where continuous GPS tracking is important.
Amazfit T-Rex Dual Solar Specifications
Here are the main specifications of the Amazfit T-Rex Dual Solar.
| Feature | Amazfit T-Rex Dual Solar |
|---|---|
| Display | 1.32-inch AMOLED |
| Screen protection | Sapphire glass |
| Peak brightness | 3,000 nits |
| Build | Grade 5 titanium bezel, buttons and back panel with fibre-reinforced polymer case |
| Case size | 51.4mm |
| Thickness | 16.9mm with heart-rate sensor, 14.5mm without |
| Battery | 660mAh |
| Solar charging | Dual-sided, display and rear panel |
| Water resistance | 10 ATM |
| Diving | 50m freediving, recreational scuba |
| Flashlight | White and red light |
| Audio | Microphone and speaker |
| Sports modes | 180+ |
| Strap | 26mm quick release |
| Colour | Basalt Black |
The 3,000-nit display should make the screen easier to see under strong sunlight.
Amazfit has also used Grade 5 titanium, which is a strong but lightweight alloy commonly used when durability is important.
The watch carries a 10 ATM water resistance rating, which means it can handle water pressure equivalent to around 100 metres.
Designed for Harsh Outdoor Conditions
The rugged design is one of the biggest highlights of the T-Rex Dual Solar.
Its display is protected by sapphire crystal, offering better scratch resistance against rocks, equipment, zips and other hard surfaces.
The smartwatch also carries military-standard durability certification.
A special Low Temperature Mode keeps important functions working at temperatures as low as -30 degrees Celsius.
There is also a built-in barometer that monitors changes in atmospheric pressure. The watch can provide storm warnings if it detects a sudden pressure change.
At higher altitudes, it can remind users to check their blood oxygen or SpO2 levels.
The diving features are also designed to work automatically. Once the watch detects that you have entered the water, it can begin recording depth and dive duration without requiring you to manually start the activity.
Offline Maps and Navigation
Navigation is an important part of a serious outdoor watch, and Amazfit has packed several useful features into the T-Rex Dual Solar.
The watch comes with full-colour preloaded base maps.
Users can also download contour maps, which show elevation and terrain using lines, along with maps for supported ski resorts.
Navigation features include:
- Turn-by-turn directions
- POI search
- Automatic rerouting
- On-watch route planning
- Contour maps
- Ski resort maps
You can save as many as 100 routes on the watch and make changes to a route directly from your wrist.
The new LiveShare Location Tracking feature allows friends, family members or teammates to follow your real-time location and direction.
However, LiveShare needs the watch to be connected to a smartphone with an active internet connection.
Amazfit also makes it clear that this feature should not be considered a replacement for a dedicated emergency beacon or rescue communication device.
Training Features for Athletes
The Amazfit T-Rex Dual Solar is not limited to hiking and adventure activities. It also includes several advanced fitness and training tools.
It can monitor Training Load, helping users understand how much strain recent workouts have placed on the body.
There is also VO2 Max, Training Effect and estimated recovery time.
Amazfit has introduced a new system called HybridCharge.
It combines Training Load information with BioCharge and LifeLoad data to look at the impact of workouts, sleep and everyday stress.
In simpler terms, the watch tries to tell you when your body has enough energy for a hard workout and when taking some extra rest may make more sense.
More than 180 sports modes are supported.
These include regular activities along with hiking, golf, recreational diving and HYROX, which combines running with different functional workout stations.
Training plans can also be imported from services including TrainingPeaks, Runna and Intervals.icu.
Completed workouts can automatically sync with Strava.
The watch supports additional accessories including Stryd footpods, external heart-rate monitors, compatible action cameras and air-quality monitors.
Everyday Smartwatch Features
Despite its focus on adventure users, the T-Rex Dual Solar also includes several useful everyday smartwatch features.
A built-in flashlight supports both white and red lighting.
Red light can be useful at night because it does not affect night vision as much as bright white light.
There is also a brighter Boost Mode along with an SOS flashing mode that can be used to attract attention during an emergency.
The watch includes both a speaker and microphone, allowing Bluetooth calls when connected to your smartphone.
Zepp Flow, Amazfit’s voice assistant, is also supported.
Android users can use it to reply to messages without touching the phone, while navigation instructions can be played through the watch speaker.
Inside the box you get the smartwatch, silicone strap and a USB Type-C compatible charging base.
A charging cable is not included, so you will need to use your own USB Type-C cable.
Amazfit T-Rex Dual Solar vs T-Rex Ultra 2 vs T-Rex 3 Pro
Here is how the new T-Rex Dual Solar compares with other rugged watches in the Amazfit T-Rex lineup.
| Feature | T-Rex Dual Solar | T-Rex Ultra 2 | T-Rex 3 Pro 48mm | T-Rex 3 Pro 44mm |
|---|---|---|---|---|
| Display | 1.32-inch AMOLED | 1.5-inch AMOLED | 1.5-inch AMOLED | 1.32-inch AMOLED |
| Case size | 51.4mm | 51mm | 48mm | 44.8mm |
| Battery | 660mAh | 870mAh | 700mAh | 500mAh |
| Solar charging | Dual-sided | No | No | No |
| Typical battery life | 25 days | 30 days | 25 days | 17 days |
| Accuracy GPS Mode | 41 hours | 50 hours | 38 hours | 26 hours |
| Diving | 50m freediving | 45m freediving | 45m freediving | 45m freediving |
| Flashlight | White or red | White or green | White or red | White or red |
| Strap | 26mm | 26mm | 22mm | 20mm |
| Buy link | See listings | Check price | View deal | Shop now |
The T-Rex Ultra 2 has the larger 870mAh battery and offers up to 30 days of regular battery life without needing sunlight.
The T-Rex Dual Solar, however, can extend its runtime considerably when enough sunlight is available. It also supports 50m freediving and includes LiveShare location tracking.
The T-Rex 3 Pro provides many of the rugged features, maps and flashlight functions found on the more expensive models.
For users who mainly stay in cities and have easy access to a charger, the T-Rex 3 Pro may provide many of the same everyday benefits without needing solar charging.
Amazfit T-Rex Dual Solar Price and India Availability
The Amazfit T-Rex Dual Solar is priced at $649.99 in the US and GBP 649.90 in the UK.
Sales started in these markets on September 22, 2026, through Amazon and Amazfit’s own online stores.
Amazfit has not announced the T-Rex Dual Solar price in India or confirmed an Indian launch date yet.
For comparison, the T-Rex Ultra 2 has an official Indian price of Rs 49,999, which gives some indication of where the Dual Solar could be positioned if it launches here.
You can track Amazfit T-Rex Dual Solar listings here.
The Amazfit T-Rex 3 Pro is currently available in India at around Rs 34,999 depending on the size and ongoing offers.
The regular T-Rex 3 is available at a lower price.
| Model | Approx Price in India | Where to Buy |
|---|---|---|
| Amazfit T-Rex 3 Pro 48mm (Black) | Around Rs 34,999 | Grab it here |
| Amazfit T-Rex 3 Pro 44mm (Arctic Gold) | Around Rs 34,999 | See today’s offer |
| Amazfit T-Rex Ultra 2 | Around Rs 46,999 to Rs 49,999 | Compare sellers |
| Amazfit T-Rex 3 (Lava) | Around Rs 21,999 | Order now |
| Amazfit T-Rex 3 (Onyx) | Varies | Check availability |
Prices can change during sales and promotional periods, so it is better to check the latest price before buying.
Useful Accessories for the Amazfit T-Rex
If you are planning to use the watch regularly for outdoor activities, a few accessories can also be useful.
| Accessory | Why It Helps | Link |
|---|---|---|
| Original Amazfit T-Rex strap | Useful if you want a replacement or another strap style | Browse straps |
| 26mm quick-release strap | Compatible with the Dual Solar and Ultra 2 strap size | Find 26mm straps |
| USB Type-C cable | Useful because a charging cable is not included in the box | Pick a cable |
| Chest heart-rate monitor | Can provide more consistent heart-rate information during intense workouts | See HR monitors |
Who Is the Amazfit T-Rex Dual Solar For?
The Amazfit T-Rex Dual Solar is clearly designed for people who spend a lot of time outdoors.
Trekkers travelling through places such as Ladakh or Spiti, long-distance cyclists, campers and endurance athletes are more likely to benefit from the dual-sided solar charging system.
For someone who mainly uses a smartwatch in the city and charges it once every week or two, solar charging may not make a major difference.
In that case, models such as the T-Rex 3 Pro or T-Rex Ultra 2 already provide rugged construction, navigation tools and long battery life.
What makes the T-Rex Dual Solar interesting is the combination of a bright AMOLED screen with solar charging from two sides.
If this technology works well in real-world outdoor conditions, it could point towards a future where rugged smartwatches can stay active for much longer without depending completely on wall chargers.
For India, the biggest unanswered questions are the launch date and price, which Amazfit has yet to announce.