Amazfit T-Rex Dual Solar vs Balance Ultra specs comparison
These two share a lot of Zepp’s latest training and navigation features, but they are aimed at different types of use. The T-Rex Dual Solar leans harder into rugged outdoor endurance with dual-sided solar charging, while the Balance Ultra has a larger 1.5-inch display, 64GB of storage and up to 30 days of typical battery life in a more general-purpose premium design.
Full comparison
The full record
76 specifications across 6 areas, with 17 genuine differences.
1. Design & display Amazfit Balance Ultra
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
Release date
2026-09-22
2026-06
Physical size
51.4 mm diameter; 16.9 mm thick including heart-rate sensor; 14.5 mm excluding sensor
51.8 x 51.8 x 15.5 mm including heart-rate sensor; 13.4 mm excluding sensor
Weight
69 g without strap
57 g without strap
Material
Grade 5 titanium bezel and buttons; fiber-reinforced polymer middle frame; Grade 5 titanium and glass-ceramic back
Grade 5 titanium bezel, frame, buttons and back cover; fiber-reinforced polymer case
Water resistance
10 ATM; recreational diving to 50 m
10 ATM; 45 m freediving; recreational scuba diving
Display type
AMOLED
AMOLED
Display size
1.32 inch
1.5 inch
Display resolution
466 x 466 pixels (353 ppi)
480 x 480 pixels (323 ppi)
Display brightness
Up to 3,000 nits
Up to 3,000 nits
Display protection
Sapphire glass
Sapphire glass
2. Battery & charging Amazfit Balance Ultra
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
Battery
Rechargeable battery; 660 mAh
Rechargeable battery; 780 mAh
Battery life
Up to 25 days typical; 13 days heavy use; up to 34 days with front solar / 51 days with rear solar (3 h/day at 50,000 lux); up to 41 hours accurate GPS; Outdoor Extreme up to 40 days / 180 days with continuous rear solar at 50,000 lux
Up to 30 days typical; 15 days heavy use; 10 days AOD; 50 hours accurate GPS; 97 hours power-saving GPS
Charging
Magnetic charging head; dual-sided solar charging
Magnetic charging head
3. Sensors & positioning No clear edge
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
GNSS type
Built-in dual-band GNSS
Built-in dual-band GNSS
GPS
Yes
Yes
GALILEO
Yes
Yes
GLONASS
Yes
Yes
QZSS
Yes
Yes
Beidou
Yes
Yes
Accelerometer
Yes
Yes
Gyroscope
Yes
Yes
Barometric altimeter
Yes
Yes
Compass
Yes
No
Geomagnetic
Yes
Yes
Ambient light sensor
Yes
Yes
Optical heart rate
Yes
Yes
Electrical heart rate
No
No
SpO2
Yes
Yes
Temperature
Yes
Yes
Galvanic skin response
No
No
Microphone
Yes
Yes
Speakers
Yes
Yes
Vibration motor
Yes
Yes
4. Health & activity Amazfit Balance Ultra
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
Steps
Yes
Yes
Distance
Yes
Yes
Calories burned
Yes
Yes
Floors
Yes
Yes
Sports tracking
180+ sports modes
180+ sports modes
Sleep
Yes
Yes
Heart rate
Yes
Yes (alerts for arrhythmia and atrial fibrillation)
HRV
Yes
Yes
Stress
Yes
Yes
Blood oxygen
Yes
Yes (all day)
Respiration rate
No
Yes
Skin temperature
Yes
Yes
ECG
No
No
Blood pressure
No
No
Body composition
No
No
Glucose
No
No
Hydration level
No
No
UV exposure
No
No
Calorie intake
No
No
Hyperglycemia risk assessment
No
No
Arterial stiffness detection
No
No
Pulse wave arrhythmia analysis
No
Yes
5. Smart features No clear edge
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
Smartphone compatibility
Android 8.0+ and iOS 17.0+
Android 8.0+ and iOS 17.0+
Operating system at launch
Zepp OS 6
Zepp OS 6
Storage
26 GB available for maps, music, apps and data
64 GB
Bluetooth
Yes (5.2)
Yes (5.2)
Wi-Fi
Yes (2.4 GHz)
Yes (2.4 GHz)
NFC / connected pay
Yes (Zepp Pay, region-dependent)
Yes (Zepp Pay, region-dependent)
UWB
No
No
Cellular
No
No
Smartphone notifications
Yes
Yes
Bluetooth calling
Yes
Yes
Smartphone music control
Yes
Yes
On-board music storage
Yes
Yes (64 GB storage space)
Voice assistant
Zepp Flow
Zepp Flow
6. Navigation & safety No clear edge
Fact
Amazfit T-Rex Dual Solar
Amazfit Balance Ultra
Maps
Yes (base, contour and ski-resort maps)
Yes (base, contour and ski-resort maps)
Offline maps
Yes
Yes
Navigation
Yes (turn-by-turn, POI display, route planning and waypoint navigation)
Yes (turn-by-turn, POI search, route planning, round-trip routes and auto-rerouting)
Emergency SOS
No
No
Satellite SOS
No
No
Fall detection
No
No
LED flashlight
Yes
Yes
Diving
Yes (recreational diving to 50 m)
Yes (45 m freediving; recreational scuba diving)