Amazfit T-Rex Dual Solar Review: DC Rainmaker Finds Negligible Solar Gains on AMOLED Rugged Watch
DC Rainmaker tested the $649 Amazfit T-Rex Dual Solar, an outdoor smartwatch that pairs a 1.3-inch AMOLED screen with front and rear solar panels. The reviewer praised its informative on-watch solar metrics widget and novel industrial design, but concluded that actual solar energy gains are virtually negligible relative to AMOLED power consumption. Significant trade-offs include a reduced 660mAh battery compared to the T-Rex Ultra 2 and rapid overheating during rear-panel solar charging in warm weather, making it an interesting tech showcase rather than a practical endurance tool.
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Published on Savlume: · Content updated: · Source published:
Media review
Review findings & buying advice
Based on DC Rainmaker ↗. AI-assisted summary of the source; not a Savlume hands-on test.
The source describes the T-Rex Dual Solar as an ambitious AMOLED-and-solar combination with a useful solar-data interface, but concludes that its real-world solar gains are small and that the design comes with trade-offs including a smaller battery, smaller display, and higher price than the T-Rex Ultra 2.
Who it may suit People who specifically want an AMOLED watch with front and rear solar panels and detailed on-watch solar-gain information.
What the source liked
The Solar widget separates front- and rear-panel gains and presents estimated gains across three watch modes.
The reviewer found the solar-gain information more detailed and practical than the Garmin watch solar displays they discussed.
The watch can reportedly charge from 0% using solar alone.
Trade-offs & limitations
The reviewer found solar gains small in real-world use, with battery consumption often offsetting the gains.
The rear panel overheated during testing in warm conditions, interrupting solar gains.
Compared with the T-Rex Ultra 2, the Dual Solar has a smaller battery and display and is reported to cost $100 more.
Source testing context The author describes outdoor solar observations and multiple workouts, including approximate exposure durations, battery percentages, and GPS activity results.
Questions this review helps answer
How much battery gain did the reviewer report from a day outdoors?
The reviewer said days spent outside typically produced about 2.5–3.0 days of smartwatch-mode solar gains, while also noting that solar gains could be offset by battery use.
Does the rear solar panel work while the watch is worn?
The source describes the rear panel as facing the wrist when worn and says it is intended to be turned toward the sun when the watch is off the wrist.
What are the listed differences from the T-Rex Ultra 2?
The source lists a 660mAh rather than 870mAh battery, a 1.3-inch rather than 1.5-inch AMOLED display, a 50m rather than 45m depth-gauge allowance, a different flashlight color, LiveShare, and a reported $649 versus $549 price.
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AI brief
Source-based
The T-Rex Dual Solar combines an AMOLED display with front and rear solar panels, and its Solar widget reports solar gains across several watch modes. It may be worth considering if you specifically want that combination and value the detailed solar data, but the source’s hands-on testing found modest gains, overheating in rear-panel use, and a smaller battery and display than the T-Rex Ultra 2.
Best suited for Buyers specifically interested in an AMOLED adventure watch with front and rear solar panels and a watch-based view of solar gains.
Highlights
The watch has both front and rear solar panels; the rear panel can collect solar when the watch is taken off and turned toward the sun.
Its Solar widget shows a recent graph, current inbound power, and estimated gains in smartwatch, battery-saver, and watch-only modes.
The source reports a 100m case waterproofing specification and a 50m depth-gauge allowance.
Consider before buying
The source says the 660mAh battery and 1.3-inch AMOLED display are smaller than the T-Rex Ultra 2’s 870mAh battery and 1.5-inch display.
In the author’s testing, the rear-facing solar mode overheated quickly in 80–90°F conditions and then stopped making solar gains until it cooled.
The author reports modest solar gains overall and one two-hour ride when the solar panel appeared not to charge during the workout.
The source says the watch uses a different charging connector from Amazfit’s other current-generation watches.
Product facts & conditions
Model / variant
T-Rex Dual Solar
AI-generated from the original report, not a hands-on review. Confirm details with the retailer. Read source ↗
Cashback, gift cards, and points are separate rewards. They are not subtracted from the checkout price. Price comparisons cover only the matching observations recorded by Savlume; they are not a complete market history.
How to get it
Exact redemption steps were not specified. Read the merchant’s conditions before ordering.
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