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Wearable comparison

Xiaomi Watch S1 vs Xiaomi Watch S4 41mm

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Xiaomi Watch S1

Xiaomi Watch S1

  • 53 g.
  • Screen: 466 × 466 pixels.
  • Runs Proprietary OS.
  • Wi-Fi 4 support.
  • 470 mAh battery capacity.
KSh 28,290In Stock
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02
Xiaomi Watch S4 41mm

Xiaomi Watch S4 41mm

  • Screen: 466 × 466 pixels; 352 ppi.
  • Runs Xiaomi HyperOS 3.
  • Bluetooth 5.4 connection.
  • 320 mAh battery capacity.
  • 5 ATM.
KSh 23,360In Stock
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2 spaces available

Apple Watch SE 2KSh 28,500
Xiaomi Watch 5KSh 30,000
Xiaomi Watch S5KSh 25,000
Amazfit GTR 3 ProKSh 20,000
Apple Watch Series 8KSh 50,000
Apple Watch UltraKSh 90,000
Samsung Galaxy Watch 6KSh 22,500
2 of 4 products

Our quick verdict

The Xiaomi Watch S1 lasts longer between charges (12 days), while the Xiaomi Watch S4 41mm is lighter to wear all day.

Display

Xiaomi Watch S1
466 × 466 pixels
Xiaomi Watch S4 41mm
466 × 466 pixels; 352 ppi

Software

Xiaomi Watch S1
Runs Proprietary OS
Xiaomi Watch S4 41mm
Runs Xiaomi HyperOS 3

Connections

Xiaomi Watch S1
Bluetooth 5.2 connection
Xiaomi Watch S4 41mm
Bluetooth 5.4 connection

Capacity

Xiaomi Watch S1
470 mAh battery capacity
Xiaomi Watch S4 41mm
320 mAh battery capacity

Portability

Xiaomi Watch S1
53 g
Xiaomi Watch S4 41mm
About 32 g

Key differences

The main differences to help you choose.

Xiaomi Watch S1

  • Longer battery life: up to 12 days (vs 8).
  • Bigger battery: 470 mAh (vs 320 mAh).

Xiaomi Watch S4 41mm

  • Lighter: about 32 g (vs 53 g).
  • Slimmer: 9.5 mm thick (vs 11 mm).
  • Newer Bluetooth 5.4 (vs 5.2).
  • Newer model: released in 2025 (vs 2021).

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

More topicsFewer topics
6 priorities selected.
How each product answers the selected priorities
PriorityXiaomi Watch S1Xiaomi Watch S4 41mm
Battery life470 mAh battery320 mAh battery
Portability53 gAbout 32 g
Display1.43-inch OLED display, 60 Hz1.32-inch OLED display, 60 Hz, 352 ppi
SoftwareProprietary OSXiaomi HyperOS 3
ConnectionsWi-Fi 4, Bluetooth 5.2Bluetooth 5.4
Sleep trackingSupported, short-nap data limitations applySleep tracking, sleep trend reports and supported improvement plan

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Display1.43-inch AMOLED1.32-inch AMOLED
Screen resolution466 × 466 pixels466 × 466 pixels; 352 ppi
Display protectionSapphire glassScratch/drop-proof glass
Display featuresAlways-on display; 60 Hz60 Hz refresh rate; up to 1,500 nits HBM

Connectivity

Connectivity specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Network / cellularNo cellular connectivityNo cellular connectivity
SIM / eSIMNoNo
Wi-FiIEEE 802.11b/g/n, 2.4 GHzNo
BluetoothBluetooth 5.2Bluetooth 5.4
NFCSupported; Mastercard payments (regional availability)Yes (market/region dependent)
Positioning / GNSSDual-band GPS; BeiDou; GLONASS; Galileo; QZSSGPS; Galileo; GLONASS; BeiDou; QZSS

Identity & design

Identity & design specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
BrandXiaomiXiaomi
ModelXiaomi Watch S1Xiaomi Watch S4 41mm
Announced2021, December 282025, June 26
Dimensions46.5 × 46.5 × 11 mm, excluding strap and protrusions41.2 × 41.2 × 9.5 mm, excluding strap and protrusions
Weight53 g (1.87 oz)Approximately 32 g without strap
Build materialsStainless-steel case; sapphire glassStainless-steel frame
Wrist size165.1–225.1 mm (leather); 149.8–233.8 mm (fluororubber)120–190 mm (black, mint green, white); 130–190 mm (sunset gold)
Strap / bandCalfskin leather and fluororubberFluororubber (black, mint green); leather (white); Milanese (sunset gold)
Controls / buttonsDedicated sport buttonRotatable crown and lower button

Performance & software

Performance & software specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Operating systemProprietary OSXiaomi HyperOS 3

Audio & communication

Audio & communication specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
SpeakerSupportedSupported
MicrophoneSupported1 microphone
CallingBluetooth calling with a connected smartphoneBluetooth calling with a connected smartphone

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
SensorsHeart-rate and blood-oxygen sensor; accelerometer; gyroscope; geomagnetic sensor; atmospheric-pressure sensor; ambient-light sensorHeart-rate and blood-oxygen sensor; accelerometer; gyroscope; ambient-light sensor; electronic compass; barometer; temperature sensor
Health & wellness featuresHeart-rate, blood-oxygen, stress and breathing features; personal reference onlyHeart rate, blood oxygen, stress and skin-temperature monitoring; supported cycle predictions; general wellness information
Sleep trackingSupported; short-nap data limitations applySleep tracking, sleep trend reports and supported improvement plan
Sports / workout modes117 workout modes, including 19 professional modes150+ sports modes
Training & outdoor featuresAutomatic detection of supported walking, outdoor running and treadmill activitiesWorkout reports; training effects, load and recovery; BLE heart-rate broadcasting to compatible bike computers
Safety & emergency features—Emergency SOS and supported skiing fall detection require prior setup, emergency contacts and connected Mi Fitness app; detection is not guaranteed; SMS and location features depend on supported phone OS

Battery & durability

Battery & durability specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Battery capacity470 mAh lithium-ion polymer320 mAh
Battery lifeUp to 12 days typical use; 24 days power-saving modeUp to 8 days light use; 4 days normal use; 3 days heavy use
ChargingWireless charging dock2-pin magnetic charging dock
Water resistance5 ATM5 ATM

Compatibility

Compatibility specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Phone compatibilityAndroid 6.0 or later; iOS 10.0 or laterAndroid 8.0 or later; iOS 14.0 or later
Companion appMi FitnessMi Fitness
ColorsBlack, SilverBlack; mint green; white; sunset gold

Additional specifications

Additional specifications specifications comparison
SpecificationXiaomi Watch S1Xiaomi Watch S4 41mm
Case material316L stainless steelStainless steel
Pixels per inch326 ppi352 ppi
Packing listWatch; wireless charging dock; USB cable; user manual; additional fluororubber strapWatch; magnetic charging dock; user manual
Display1.43-inch AMOLED; 466 × 466—
Case and glassStainless steel case; sapphire glass—
PositioningDual-band GNSS: GPS, BeiDou, GLONASS, Galileo and QZSSFive-system independent dual-frequency L1 + L5 GNSS
Workout modes117 modes, including 19 professional modes; software dependent—
Battery470mAh lithium-ion polymer320mAh; up to 8 days light / 4 days normal / 3 days heavy under tests
Battery lifeUp to 12 days typical use or 24 days power saving in manufacturer testing—
Bluetooth and Wi-FiBluetooth 5.2; 2.4GHz Wi-Fi—
Dimensions46.5 × 46.5 × 11mm, excluding strap and local protrusions—
Water resistance5 ATM; restrictions apply—
Package contentsWatch, wireless charging dock, USB cable, manual and additional fluororubber strap—
Release statusAvailable. Released 2021, December 31Available. Released 2025, June 26
Model numbersM2108W1M2502W1
Card slotNoNo
CameraNoNo
3.5 mm headphone jackNoNo
USBNoNo
RadioNoNo
2G bandsNot applicableNot applicable
3G bands——
4G bands——
Network speedNo—
Watch weight without strap—Approximately 32g without strap
Peak brightness—1,500 nits HBM
Cover / touchscreen—AMOLED touchscreen
Heavy-use battery life—Up to 3 days under manufacturer heavy-use tests
Display—1.32-inch AMOLED; 466 × 466; 352ppi
Brightness / refresh—Up to 1500nits HBM full screen; up to 60Hz depending on interface
Size / weight—41.2 × 41.2 × 9.5mm; approximately 32g without strap
Strap options—Black / Mint Green: fluororubber; White: leather; Sunset Gold: Milanese
Wrist fit—Black, Mint Green and White: approximately 120–190mm; Sunset Gold: approximately 130–190mm
Wireless / calls—Bluetooth 5.4; connected-phone calls
System / app—Xiaomi HyperOS 3; Mi Fitness
Phone compatibility—Android 8.0+; iOS 14.0+
Water resistance—5ATM; appropriate shallow-water use; no hot showers, saunas or diving; protect leather strap from water
Package—One Xiaomi Watch S4 41mm with selected strap, magnetic charging dock, user manual including warranty notice

Similarities

  • Both have 60 Hz displays.
  • Both have NFC.
  • Both have a stainless steel case.
  • Both are water resistant to 50 m.
  • Both take calls over Bluetooth.
  • Both have similar screen sizes (1.43 and 1.32 inches).

In summary

Get the Xiaomi Watch S1 if you want longer battery life, or the Xiaomi Watch S4 41mm if you would rather have a lighter watch for all-day wear.

Back to compared products ↑

In-stock alternatives

Apple Watch SE 2For Xiaomi Watch S1Apple Watch SE 2View product ↗OnePlus Watch 2RFor Xiaomi Watch S1OnePlus Watch 2RView product ↗Amazfit Active MaxFor Xiaomi Watch S4 41mmAmazfit Active MaxView product ↗Amazfit Active 3 PremiumFor Xiaomi Watch S4 41mmAmazfit Active 3 PremiumView product ↗

Related comparisons

Apple Watch SE 2Xiaomi Watch S1Xiaomi Watch 5Xiaomi Watch S1Xiaomi Watch S5Xiaomi Watch S1
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