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Wearable comparison

Samsung Galaxy Watch 9 40mm vs Amazfit Balance 2

Compare battery life, health tracking, display and fit.

Compared products
01Selected
Samsung Galaxy Watch 9 40mm

Samsung Galaxy Watch 9 40mm

  • Screen: 44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels.
  • Qualcomm Snapdragon Wear Elite, 3 nm processor.
  • 2 GB RAM in this version.
  • 32 GB storage in this version.
  • Runs Wear OS 7; One UI 9 Watch.
KSh 39,500In Stock
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02
Amazfit Balance 2

Amazfit Balance 2

  • Screen: 480 × 480 pixels; 323 ppi.
  • 32 GB storage in this version.
  • Runs Zepp OS 6.
  • 658 mAh battery capacity.
  • Bluetooth 5.2.
KSh 39,000In Stock
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2 spaces available

Samsung Galaxy Watch 9 44mmKSh 42,000
OnePlus Watch 4KSh 38,500
Samsung Galaxy Watch UltraKSh 45,000
Google Pixel Watch 3KSh 37,500
Samsung Galaxy Watch 8 ClassicKSh 38,500
Samsung Galaxy Watch Ultra 2025KSh 44,000
Google Pixel Watch 5 41mmKSh 42,000
2 of 4 products

Our quick verdict

The Amazfit Balance 2 lasts longer between charges (up to 21 days), works with Android phones and iPhones and is swimproof to 100 m, while the Samsung Galaxy Watch 9 40mm takes ECG heart-rhythm readings, is lighter to wear all day and has a brighter screen for outdoor use.

Display

Samsung Galaxy Watch 9 40mm
44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels
Amazfit Balance 2
480 × 480 pixels; 323 ppi

Software

Samsung Galaxy Watch 9 40mm
Runs Wear OS 7; One UI 9 Watch
Amazfit Balance 2
Runs Zepp OS 6

Battery life

Samsung Galaxy Watch 9 40mm
Up to 30 hours per charge
Amazfit Balance 2
658 mAh battery

Portability

Samsung Galaxy Watch 9 40mm
31.5 g
Amazfit Balance 2
43 g

Connections

Samsung Galaxy Watch 9 40mm
Bluetooth 5.3
Amazfit Balance 2
Bluetooth 5.2

Key differences

The main differences to help you choose.

Samsung Galaxy Watch 9 40mm

  • Brighter display: up to 3,000 nits (vs 2,000).
  • Lighter: 31.5 g (vs 43 g).
  • ECG heart-rhythm readings.
  • Aluminium case (vs plastic case).
  • Slimmer: 8.6 mm thick (vs 12.3 mm).
  • Dual-band Wi-Fi (vs 2.4 GHz only).

Amazfit Balance 2

  • Longer rated battery life: up to 21 days (vs 30 hours).
  • Works with Android phones and iPhones.
  • Swimproof: water resistant to 100 m (vs 50 m).
  • Syncs with third-party apps such as Strava and Apple Health.
  • Water resistant to 10 ATM (vs 5 ATM).

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.

6 priorities selected.
How each product answers the selected priorities
PrioritySamsung Galaxy Watch 9 40mmAmazfit Balance 2
Battery lifeUp to 30 hours per charge658 mAh battery
Display1.47-inch OLED display1.5-inch OLED display, 323 ppi
SoftwareWear OS 7Zepp OS 6
ConnectionsBluetooth 5.3Bluetooth 5.2
Battery capacity44 mm: 445 mAh658 mAh battery
Water resistanceIP68 water and dust resistance10 ATM

Detailed comparison

Explore the full specifications, section by section.

Display

Display specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
Display44 mm: 1.47-inch Super AMOLED; 40 mm: 1.34-inch Super AMOLED1.5-inch AMOLED
Screen resolution44 mm: 480 × 480 pixels; 40 mm: 438 × 438 pixels480 × 480 pixels; 323 ppi
Display protectionSapphire crystalSapphire glass
Display features3000 nits (peak)—

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
Network / cellularGSM / HSPA / LTE—
SIM / eSIMeSIM—
Wi-FiWi-Fi 2.4 GHz + 5 GHzWi-Fi 2.4 GHz
BluetoothBluetooth 5.3Bluetooth 5.2 BLE
NFCSupported—
Positioning / GNSSDual-frequency GPS, L1 + L5Dual-band GNSS; circularly polarized antenna; 6 satellite systems
Satellite features—No

Identity & design

Identity & design specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
BrandSamsungAmazfit
ModelSamsung Galaxy Watch 9 (40 mm and 44 mm configurations)Amazfit Balance 2
Announced2026, July 22June 24, 2025
Dimensions44 mm: 46.0 × 43.7 × 8.6 mm; 40 mm: 42.7 × 40.4 × 8.6 mm47.4 × 47.4 × 12.3 mm without heart-rate sensor base
Weight44 mm: 34.0 g; 40 mm: 31.5 g, without band43 g without strap
Build materialsAluminum caseAluminum-alloy frame; fibre-reinforced polymer case
Strap / bandLightweight breathable Sport Band with Dynamic Lug System22 mm silicone; pin buckle; standard and accessory straps
Controls / buttonsTouchscreen and two side buttonsTwo physical buttons and touchscreen
Wrist size—140–210 mm

Performance & software

Performance & software specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
ProcessorQualcomm Snapdragon Wear Elite, 3 nm—
CPU5-core—
RAM2 GB—
Storage32 GB32GB
Operating systemWear OS 7; One UI 9 WatchZepp OS 6

Audio & communication

Audio & communication specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
SpeakerSupportedTwo speakers
MicrophoneSupportedSupported
CallingBluetooth calling with a connected smartphone; standalone calling on LTE editionsBluetooth calling

Sensors, health & fitness

Sensors, health & fitness specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
SensorsSamsung BioActive: optical heart-rate, electrical heart signal, bioelectrical impedance analysis; temperature; accelerometer; barometer; gyroscope; geomagnetic; light sensorBioTracker 6.0 PPG; 5 PD + 2 LED; accelerometer; gyroscope; barometer; ambient light; geomagnetic sensor; temperature
Health & wellness featuresHeart rate; SpO₂; ECG; body composition; temperature; stress; Vitals; Heart Health Score24-hour heart rate, SpO₂ and stress; one-tap measurement; high and low heart-rate alerts; low SpO₂ alerts; breathing exercises; PAI; heart-rate recovery; menstrual-cycle tracking; HybridCharge
Sleep trackingSleep-stage tracking; sleep-apnea risk detection; sleep VitalsSleep HRV; sleep stages including REM; naps; sleep schedule; breathing quality; sleep score
Sports / workout modesAutomatic and manual workout tracking across running, walking, cycling, swimming and other activities180+ sports modes
Training & outdoor featuresDaily Cardio Load; Fitness Index; workout and recovery guidanceZepp Coach; PeakBeats; HybridCharge; training and interval templates; HYROX templates and Virtual Pace; track running; trajectory correction; virtual pacer; offline maps; golf and ski maps
Safety & emergency featuresFall detection and Emergency SOS—
Diving / depth features—Scuba-diving support; follow the manufacturer’s dive-mode limits and safety guidance

Battery & durability

Battery & durability specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
Battery capacity44 mm: 445 mAh; 40 mm: 390 mAh658 mAh rated
Battery lifeUp to 30 hours with AOD on21 days typical; 10 days heavy; 33 hours accurate GPS; 67 hours GPS power saver
ChargingFast wireless charging, WPC-basedMagnetic charging head
Water resistance5 ATM; IP6810 ATM
Durability / certificationsMIL-STD-810HMIL-STD-810G-2014 low-pressure, temperature, shock, vibration and impact tests; TUV water-resistance report 68.189.25.0132.01

Compatibility

Compatibility specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
Phone compatibilityAndroid 13.0 or later; more than 1.5 GB RAM; Google Mobile ServicesAndroid 7 or later; iOS 15 or later
Companion appGalaxy Wearable; Samsung HealthZepp
Colors44 mm: Graphite, Silver; 40 mm: Graphite, CreamBlack; Lava accessory strap

Additional specifications

Additional specifications specifications comparison
SpecificationSamsung Galaxy Watch 9 40mmAmazfit Balance 2
Case materialAluminumAluminum alloy; fibre-reinforced polymer
Peak brightness3,000 nits peak2,000 nits peak
Charging time44 mm: 100% in 90 minutes, 45% in 30 minutes; 40 mm: 100% in 80 minutes, 50% in 30 minutes—
Release statusAvailable. Released 2026, August 07—
Model numbersSM-L340, SM-L350, SM-L345F, SM-L355F, SM-L345U, SM-L355U—
Card slotNo—
CameraNo—
3.5 mm headphone jackNo—
USBNo—
RadioNo—
2G bandsGSM 850 / 900 / 1800 / 1900—
3G bandsHSDPA 850 / 900 / 2100—
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66, 71—
Network speedHSPA, LTE—
SAR (US)1.06 W/kg (body)—
SAR (EU)0.70 W/kg (body)—
Additional durability featuresArmor Aluminum 2—
Pixels per inch—323 ppi
Packing list—Watch with standard strap; magnetic charging head; instruction manual
Smart recognition—25 strength-training movements; 8 sports movements
Third-party fitness apps—Runna; Strava; TrainingPeaks; Intervals.icu; Google Fit; Apple Health

Similarities

  • Both take calls over Bluetooth.
  • Both have OLED displays.
  • Both offer 32 GB of storage.
  • Both have similar screen sizes (1.47 and 1.5 inches).
  • Both connect over Bluetooth.
  • Both have 480 × 480 screens.

In summary

Get the Amazfit Balance 2 if you want longer battery life and a choice of Android phone or iPhone, or the Samsung Galaxy Watch 9 40mm if you would rather have ECG heart-rhythm readings and a lighter watch for all-day wear.

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In-stock alternatives

Samsung Galaxy Watch 8 ClassicFor Samsung Galaxy Watch 9 40mmSamsung Galaxy Watch 8 ClassicView product ↗OnePlus Watch 4For Samsung Galaxy Watch 9 40mmOnePlus Watch 4View product ↗Google Pixel Watch 3For Amazfit Balance 2Google Pixel Watch 3View product ↗WHOOP ONE 5.0 SensorFor Amazfit Balance 2WHOOP ONE 5.0 SensorView product ↗

Related comparisons

Samsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 44mmSamsung Galaxy Watch 9 40mmOnePlus Watch 4Samsung Galaxy Watch UltraSamsung Galaxy Watch 9 40mmGoogle Pixel Watch 3Samsung Galaxy Watch 9 40mmSamsung Galaxy Watch 8 ClassicSamsung Galaxy Watch 9 40mmSamsung Galaxy Watch Ultra 2025Samsung Galaxy Watch 9 40mmSamsung Galaxy Watch 9 40mmGoogle Pixel Watch 5 41mmSamsung Galaxy Watch 9 40mmHuawei Watch 6 Pro 43 mmSamsung Galaxy Watch 9 40mmGarmin CIRQA Smart Band
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