Model NameApple Watch Series 9
Dimensions (Aluminum, 45mm / 41mm)45 x 38 x 10.7 mm (39 (1.38 oz)) / [41 x 35 x 10.7 mm (32.1 g (1.13 oz))
Dimensions (Stainless Steel, 45mm / 41mm)[45 x 38 x 10.7 mm (51.5 g (1.83 oz))] / [41 x 35 x 10.7 mm (42.3 g (1.48 oz))]
Build (Aluminum)Glass front, ceramic/sapphire crystal back, aluminum frame
Build (Stainless Steel)Glass front, ceramic/sapphire crystal back, stainless steel frame
SIMNo eSIM or eSIM
IP6X certified
ECG certified (region dependent SW application; HW available on all models)
IP6X certified
ECG certified (region dependent SW application; HW available on all models)
Display TypeRetina LTPO OLED, 2000 nits (peak)
Display Size (45mm / 41mm)1.9 inches / 1.69 inches
Resolution (45mm / 41mm)484 x 396 pixels (~326 ppi density) / 430 x 352 pixels (~326 ppi density)
Protection (Aluminum)Ion-X strengthened glass
Always-on display
Always-on display
Protection (Stainless Steel)Sapphire crystal glass
Always-on display
Always-on display
OSwatchOS
ChipsetApple S9
CPUDual-core
GPUPowerVR
Memory Card SlotNo
Internal64GB
Main Camera (Single)No
LoudspeakerYes
3.5mm JackNo
WLANWi-Fi 802.11 b/g/n, dual-band
Bluetooth5.3, A2DP, LE
PositioningGPS, GLONASS, GALILEO, QZSS, BDS
NFCYes
RadioNo
USBNo
SensorsAccelerometer, gyro, heart rate, barometer, always-on altimeter, compass, SpO2, VO2max, temperature (body)
Temperature sensing (0.01˚ accuracy)
Ultra Wideband 2 (UWB) support
Temperature sensing (0.01˚ accuracy)
Ultra Wideband 2 (UWB) support
Battery Type (Aluminum, 45mm / 41mm)Li-Ion 308 mAh, non-removable / Li-Ion 282 mAh, non-removable
ChargingWireless, 0-80% in 45 min (advertised)
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