Amazfit T-Rex Ultra 2 vs Amazfit T-Rex Dual Solar
The Amazfit T-Rex Dual Solar lists for about $100 more than the Amazfit T-Rex Ultra 2. On the headline smartwatch-mode figure, 30 days for the Amazfit T-Rex Ultra 2 against 25 days for the Amazfit T-Rex Dual Solar. Amazfit publishes no always-on figure for the Amazfit T-Rex Dual Solar. For a GPS workout the figures are 50 h and 41 h. Every other published figure for both is in the table, with the rows where they differ tinted.
Amazfit
Amazfit T-Rex Ultra 2
~$550
Amazfit's expedition model uses a 51 mm titanium-trimmed case, an 870 mAh battery and 64GB of storage.
Best for: Multi-day backpackers, divers and cold-weather users who want the longest-running T-Rex without solar.
Amazfit
Amazfit T-Rex Dual Solar
~$650
Solar charging through both faces is what separates this T-Rex: Amazfit calls it the first dual-sided solar system on an AMOLED smartwatch, harvesting light through the display and a glass-ceramic back plate with more than twice the front's active area.
Best for: Off-grid hikers who can clip the watch to a pack in daylight and want to stop thinking about chargers.
| Specification | Amazfit T-Rex Ultra 2 | Amazfit T-Rex Dual Solar |
|---|---|---|
| Approx. price | ~$550 (Black Magma, $549.99 on us.amazfit.com) | ~$650 (Basalt Black, $649.99 on us.amazfit.com) |
| Type | Rugged outdoor | Rugged outdoor |
| Platform | Zepp OS | Zepp OS |
| Case sizes | 51 mm | 51.4 mm |
| Weight | 51 mm: 89.2 g (with strap) | 51.4 mm: 69 g (watch body without strap (black strap 25.5 g)) |
| Battery, smartwatch mode | 30 days (Amazfit: "Typical Use Battery Life: Up to 30 days" (heavy use up to 15 days)) | 25 days (Amazfit: "Typical Use Battery Life: Up to 25 days" (heavy use up to 13 days), before solar) |
| Battery, always-on display | 10 days (Amazfit: "AOD Mode: Up to 10 days") | Not published by the maker |
| Always-on keeps | 33% of the headline figure | not published |
| Battery, GPS workout | 50 h (Amazfit: "Accurate GPS Mode: Up to 50 hours" (dual-frequency, all satellites); no standard single-band figure published) | 41 h (Amazfit: "Accurate GPS Mode: Up to 41 hours"; no standard single-band figure published) |
| Battery, dual-band GPS | 50 h | not published |
| Battery note | Amazfit: Power-Saving GPS (single frequency) up to 90 hours, GPS Max Battery Life 177 hours, Low Temperature Mode up to 40 hours with GPS. | Amazfit: up to 34 days with 3 hours of front-side solar a day and 51 days with 3 hours of rear-side solar (50,000 lux); Clock Mode up to 60 days; no always-on battery figure published. |
| Works with | Android; iPhone with limits | Android; iPhone with limits |
| iPhone | Yes, with limits | Yes, with limits |
| Android | Yes | Yes |
| Phone limits | Amazfit lists Call Quick Reply as Android only, so iPhone owners cannot send quick replies from the watch; phone camera control is iOS only. | Amazfit lists Call Quick Reply as Android only, so iPhone owners cannot send quick replies from the watch; phone camera control is iOS only. |
| Paid tier | Zepp Aura, $69.99/year | Zepp Aura, $69.99/year |
| What the paid tier gates | No watch feature requires it; Amazfit sells workout and recovery data in the Zepp App with no subscription. Zepp Aura adds unlimited AI sleep-assistant chats (free users get one message a day), detailed weekly and monthly sleep reports, and the full sleep and meditation music library. | No watch feature requires it; Amazfit sells workout and recovery data in the Zepp App with no subscription. Zepp Aura adds unlimited AI sleep-assistant chats (free users get one message a day), detailed weekly and monthly sleep reports, and the full sleep and meditation music library. |
| Update years | Not published by the maker | Not published by the maker |
| Cleared health features | None the maker cites | None the maker cites |
| Display | AMOLED | AMOLED |
| Always-on display | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Maps | Full topo maps on the watch (Amazfit: "Preloaded Base Maps, Downloadable Contour Maps & Ski Resort Maps, Turn-by-Turn Navigation, POI Search, Route Planning, Auto Rerouting"; 64GB storage) | Full topo maps on the watch (Amazfit: "Preloaded Base Maps, Downloadable Contour Maps & Ski Resort Maps, Turn-by-Turn Navigation, POI Search, Route Planning, Auto Rerouting") |
| Music on the watch | Yes | Yes |
| LTE | No LTE version | No LTE version |
| Contactless pay | No | No |
| Flashlight | Yes | Yes |
| Water rating | 10 ATM | 10 ATM |
| Case | fiber-reinforced polymer case, grade 5 titanium bezel, buttons and back | grade 5 titanium bezel and buttons, fiber-reinforced polymer frame, titanium and glass-ceramic back |
| Released | 2026 | 2026 |
Amazfit T-Rex Ultra 2: what it gives up
- 89.2 g with strap is heavy for sleep tracking
- 51 mm case only; no smaller size
- Contour maps must be downloaded; only base maps are preloaded
Amazfit T-Rex Dual Solar: what it gives up
- The most expensive Amazfit watch, and 41 hours of dual-band GPS is below the T-Rex Ultra 2
- Solar figures assume three hours a day at 50,000 lux
- 69 g body plus strap is heavy
- Smaller 1.32-inch screen than the T-Rex Ultra 2
Full pages: Amazfit T-Rex Ultra 2 · Amazfit T-Rex Dual Solar