Amazfit T-Rex Dual Solar smartwatchRugged outdoor~$650

Amazfit

Amazfit T-Rex Dual Solar

Android; iPhone with limitsPaid tier: Zepp Aura

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. Without sun it is rated at 25 days of typical use; with three hours a day of rear-side sun Amazfit quotes up to 51. Maps, dual-band GPS, flashlight and 10 ATM rating follow the rest of the T-Rex line.

Approx. price

~$650

maker's list price, not a live price

Battery, smartwatch mode

25 days

the maker's headline

Battery, always-on display

not published

the maker gives no figure

Battery, GPS workout

41 h

maker's figure

Works with

Android; iPhone with limits

see the limits below

Weight

69 g

watch body without strap (black strap 25.5 g)

Best for: Off-grid hikers who can clip the watch to a pack in daylight and want to stop thinking about chargers.

Battery: the claim and the other two figures

Claimed (smartwatch mode)
25 days
With always-on display
not published
GPS workout
41 h
  • Headline: Amazfit: "Typical Use Battery Life: Up to 25 days" (heavy use up to 13 days), before solar.
  • GPS: Amazfit: "Accurate GPS Mode: Up to 41 hours"; no standard single-band figure published.
  • 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.

The ring’s outer track is the headline claim; the inner two are the always-on and GPS figures as a share of it. An empty track means Amazfit does not publish that figure. Why the figures differ

Phones, paid tier and updates

iPhone:
Yes, with limits.
Android:
Yes.
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.
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.
Watch plus two years of Zepp Aura: ~$790.
Software updates:
Amazfit does not publish a guaranteed number of update years for this model.

Cleared health features

Amazfit cites no regulator clearance for a health feature on this model. Its heart-rate, sleep and blood-oxygen readings are wellness features.

A clearance says what a feature is allowed to claim, not that it replaces a doctor. Cleared versus wellness features

What the extra money buys: Against the Amazfit T-Rex 3 Pro, the extra ~$250 buys 15 h more GPS time and a longer headline battery (25 days vs 17 days). See the Amazfit T-Rex 3 Pro.

Specifications

Approx. price
~$650 (Basalt Black, $649.99 on us.amazfit.com)
Type
Rugged outdoor
Platform
Zepp OS
Case sizes
51.4 mm
Weight
51.4 mm: 69 g (watch body without strap (black strap 25.5 g))
Battery, smartwatch mode
25 days (Amazfit: "Typical Use Battery Life: Up to 25 days" (heavy use up to 13 days), before solar)
Battery, always-on display
Not published by the maker
Battery, GPS workout
41 h (Amazfit: "Accurate GPS Mode: Up to 41 hours"; no standard single-band figure published)
Battery note
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
iPhone
Yes, with limits
Android
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.
Paid tier
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.
Update years
Not published by the maker
Cleared health features
None the maker cites
Display
AMOLED
Always-on display
Yes
Dual-band GPS
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")
Music on the watch
Yes
LTE
No LTE version
Contactless pay
No
Flashlight
Yes
Water rating
10 ATM
Case
grade 5 titanium bezel and buttons, fiber-reinforced polymer frame, titanium and glass-ceramic back
Released
2026

Features, per Amazfit

  • Solar charging through the AMOLED display and a glass-ceramic back plate
  • 1.32-inch AMOLED, up to 3,000 nits, sapphire glass
  • Dual-band GPS across 6 satellite systems
  • Preloaded base maps, downloadable contour and ski maps, on-watch route planning
  • Flashlight
  • Low Temperature Mode down to -30°C
  • 10 ATM; Amazfit lists 50 m freediving and recreational scuba

Where the specs put it ahead

  • Rear solar panel can charge while the watch is clipped to a pack, not only on the wrist
  • Up to 51 days with daily sun against 30 for the non-solar T-Rex Ultra 2
  • Solar charging without giving up a 3,000-nit AMOLED screen
  • Route planning on the watch from preloaded maps, no phone needed

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

The two lists above are drawn from the maker’s own pages and prices, not from owner reports. Where owner discussion has been read it appears in its own section below, so the two are never mistaken for each other.

What owners say

No owner discussion has been read for the Amazfit T-Rex Dual Solar yet. This section stays empty until there is something real to put in it.

Others in the same part of the catalog

Amazfit T-Rex Ultra 2 smartwatch
Amazfit~$550

Amazfit T-Rex Ultra 2

Rugged outdoor · Zepp OS

Android; iPhone with limitsPaid tier: Zepp Aura
smartwatch mode
30 days
always-on display
10 days
GPS workout
50 h
  • 30-day battery
  • 177 h GPS Max
  • 45 m dive rated

Best for: Multi-day backpackers, divers and cold-weather users who want the longest-running T-Rex without solar.

Amazfit T-Rex 3 Pro smartwatch
Amazfit~$400

Amazfit T-Rex 3 Pro

Rugged outdoor · Zepp OS

Android; iPhone with limitsPaid tier: Zepp Aura
smartwatch mode
17 days
always-on display
not published
GPS workout
26 h
  • Two case sizes
  • Preloaded maps
  • Flashlight

Best for: Hikers and divers who want a rugged mapping watch, including a 44 mm size for smaller wrists.

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