Screen size
Watch S21.4"
Watch S5Winner: 1.5"+3.4%
Quick verdict
Watch S5 leads the measured specs 6-2.
Measured wins
Watch S2
2
spec wins
Ties
4
equal specs
Watch S5
6
spec wins
Overall winner
Screen size
Technology
Watch S2
No cellular connectivity
Watch S5
HSPA / LTE
2G bands
Watch S2
N/A
Watch S5
3G bands
Watch S2
N/A
Watch S5
HSDPA
4G bands
Watch S2
N/A
Watch S5
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
LTE
Speed
Watch S2
No
Watch S5
HSPA, LTE
GPRS
Watch S2
No
Watch S5
No
EDGE
Watch S2
No
Watch S5
No
Announced
Watch S2
2022, December 11
Watch S5
2026, May 28
Status
Watch S2
Available. Released 2022, December 11
Watch S5
Available. Released 2026, May 28
Dimensions
Watch S2
46 x 46 x 10.7 mm (1.81 x 1.81 x 0.42 in)
Watch S5
46 x 46 x 11 mm (1.81 x 1.81 x 0.43 in)
Weight
Watch S2
-
Watch S5
46 g (1.62 oz)
Build
Watch S2
Sapphire crystal front, stainless steel frame
Watch S5
Glass front, stainless steel frame, stainless steel/ceramic/forged carbon bezel
SIM
Watch S2
No
Watch S5
eSIM (market/region dependent)
Other
Watch S2
Waterproof (5ATM)
Watch S5
Waterproof (5ATM)
Type
Watch S2
AMOLED
Watch S5
AMOLED, 1500 nits (HBM), 2500 nits (peak)
Size
Watch S2
1.43 inches
Watch S5
1.48 inches
Resolution
Watch S2
466 x 466 pixels (~326 ppi density)
Watch S5
480 x 480 pixels (~459 ppi density)
Protection
Watch S2
-
Watch S5
Drop-proof glass
OS
Watch S2
Proprietary OS
Watch S5
Xiaomi HyperOS 3
Card slot
Watch S2
No
Watch S5
No
Other
Watch S2
No
Watch S5
No
Loudspeaker
Watch S2
Yes
Watch S5
Yes
3.5mm jack
Watch S2
No
Watch S5
No
WLAN
Watch S2
No
Watch S5
No
Bluetooth
Watch S2
5.2, A2DP, LE
Watch S5
5.4, LE
Positioning
Watch S2
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
Watch S5
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
Watch S2
Yes
Watch S5
Yes (market/region dependent)
Radio
Watch S2
No
Watch S5
No
USB
Watch S2
No
Watch S5
No
Sensors
Watch S2
Accelerometer, gyro, compass, barometer, heart rate, SpO2, thermometer (skin temperature), body composition (BMI)
Watch S5
Accelerometer, gyro, compass, barometer, heart rate, SpO2
Type
Watch S2
Li-Po 500 mAh
Watch S5
Li-Po 815 mAh
Charging
Watch S2
Wireless
Watch S5
-
Colors
Watch S2
Black, Silver, Light Gold
Watch S5
Black, Silver, Ceramic Blue, Jungle Green, Beige (eSIM)
Price
Watch S2
About 150 EUR
Watch S5
About 180 EUR
Models
Watch S2
-
Watch S5
M2530W1, M2517W1