Amazfit T-Rex Ultra 2 / Apple Watch SE (2nd generation, 44 mm)

Amazfit T-Rex Ultra 2: A2550 · 51 mm · Black Magma · silicone strap

Apple Watch SE (2nd generation, 44 mm): Apple Watch SE (2nd generation), 44 mm aluminium case; GPS and GPS + Cellular models. The 40 mm case, the original Apple Watch SE (2020) and Apple Watch SE 3 are separate models.

SpecificationAmazfit T-Rex Ultra 2Apple Watch SE (2nd generation, 44 mm)
Release year20262022
Announcement / availability19 February 2026 Amazfit—
Display1.5-inch AMOLED · 480 × 480 · sapphire glass AmazfitRetina LTPO OLED; 368 × 448 pixels, 977 sq mm display area, 326 ppi; up to 1000 nits; Ion-X glass

SE has no always-on mode; the screen wakes when you raise your wrist. Ion-X is strengthened glass and is not as scratch-resistant as sapphire.

Apple
Peak brightnessUp to 3000 nits

With auto brightness; unavailable in low-temperature mode or below 30% battery.

Amazfit		—
BodyPolymer case; Grade 5 titanium bezel, buttons and back Amazfit—
Size / weight51 × 51 × 14.3 mm; 89.2 g with strap

Thickness excludes heart-rate sensor base.

Amazfit		—
Strap26 mm silicone; 145–215 mm wrist Amazfit—
Storage64 GB total; up to 26.7 GB user space Amazfit—
PositioningDual-band GNSS; six satellite systems Amazfit—
SensorsBioTracker 6.0 PPG; barometer, compass, motion and temperature sensors Amazfit2nd-gen optical heart sensor; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope; ambient light sensor

The high-g accelerometer and gyroscope are used for Crash Detection. ECG, blood oxygen and temperature sensors are not included on this model.

Apple
Battery870 mAh; up to 30 typical / 15 heavy / 10 AOD days

Separate manufacturer scenarios, not continuous GPS endurance.

Amazfit		Up to 18 hours; about 80% charge in about 1.5 hours

Apple measures 18 hours with 90 time checks, 90 notifications, 45 minutes of app use and a 60-minute workout with music; on the cellular model, 4 of those hours are on LTE. Longer GPS workouts shorten it.

Apple
GPS battery modesUp to 50 Accurate / 90 saving / 177 max-battery hours Amazfit—
WirelessBluetooth 5.2 BLE; 2.4 GHz Wi-Fi Amazfit—
Water / diving10 ATM; recreational diving up to 45 m

Not for technical, cave or mixed-gas diving.

Amazfit		—
Phone connectionAndroid 7+ / iOS 15+; Zepp app Amazfit—
ChargingMagnetic charging puck; USB-C cable separate Amazfit—
CallsBluetooth calls using microphone/speaker Amazfit—
Case and weight—44 × 38 × 10.7 mm aluminium case; GPS 32.9 g, GPS + Cellular 33 g

Weight is for the case only and rises with the band. The 44 mm case fits 140–245 mm wrists.

Apple
Chip and storage—S8 SiP (64-bit dual-core processor); 2-core Neural Engine; 32 GB

Storage holds music, podcasts and apps and cannot be expanded.

Apple
Safety features—Emergency SOS; International Emergency Calling; Fall Detection; Crash Detection

Crash Detection can call emergency services after a severe car crash. Emergency SOS needs a cellular connection or Wi-Fi calling with internet access from the watch or a nearby iPhone.

Apple
Water resistance—50 metres under ISO 22810:2010

Suitable for swimming, but not for scuba diving, water skiing or high-velocity water sports.

Apple
Location and wireless—L1 GPS, GNSS, Galileo and QZSS; Wi-Fi 4 (802.11n); Bluetooth 5.3; LTE and UMTS on the GPS + Cellular model

The cellular model can make calls and use data without your iPhone nearby; carrier support is required.

Apple
Compatibility—iPhone Xs or later with iOS 18

The watch can only be set up and used with an iPhone; it does not work with Android phones.

Apple
Colours—Midnight, Starlight and Silver Apple