| Product |
Apple Watch Edition Series 2 42mm
|
Apple Watch Series 4 Aluminum
|
| Battery |
| Charging |
Wireless |
Wireless |
| Type |
Li-Ion 334 mAh (1.27 Wh), non-removable |
Li-Ion 292 mAh (1.12 Wh), non-removable |
| Body |
| Build |
Glass front (Sapphire crystal), ceramic back, ceramic frame |
Glass front, ceramic/sapphire crystal back, aluminum frame |
| Dimensions |
42.6 x 36.5 x 11.4 mm (1.68 x 1.44 x 0.45 in) |
44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in) |
| SIM |
No |
eSIM |
| Weight |
45.6 g body (1.62 oz) |
36.7 g (1.31 oz) |
| |
50m water resistant |
50m water resistant
ECG certified (region dependent SW application; HW available on all models) |
| Camera |
| |
No |
No |
| Comms |
| Bluetooth |
4.0, LE |
5.0, A2DP, LE |
| NFC |
Yes |
Yes |
| Positioning |
GPS, GLONASS |
GPS, GLONASS, GALILEO, QZSS |
| Radio |
No |
No |
| USB |
No |
No |
| WLAN |
Wi-Fi 802.11 b/g/n |
Wi-Fi 802.11 b/g/n |
| Display |
| Protection |
Sapphire crystal glass |
Ion-X strengthened glass |
| Resolution |
390 x 312 pixels (~303 ppi density) |
448 x 368 pixels (~326 ppi density) |
| Size |
1.65 inches |
1.78 inches |
| Type |
Retina OLED, 1000 nits (peak) |
Retina LTPO OLED, 1000 nits (peak) |
| |
- |
3D Touch display |
| Features |
| Sensors |
Accelerometer, gyro, heart rate |
Accelerometer, gyro, heart rate, barometer |
| |
Natural language commands and dictation |
Natural language commands and dictation (talking mode) |
| Launch |
| Announced |
2016, September. Released 2016, December |
2018, September. Released 2018, September |
| Status |
Discontinued |
Discontinued |
| Memory |
| Card slot |
No |
No |
| Internal |
8GB 512MB RAM |
16GB 1GB RAM |
| Misc |
| Colors |
Sport Band/White |
Silver, Gold, Space Gray |
| Models |
A1817 |
A1975, A1976, A2007, A2008, A1977, A1978 |
| Network |
| 2G bands |
N/A |
GSM 850 / 900 / 1800 / 1900 |
| 3G bands |
- |
HSDPA 850 / 900 / 2100 / 800 - Europe, Australia |
| 4G bands |
- |
1, 3, 5, 7, 8, 18, 19, 20, 26 - Europe, Australia |
| EDGE |
No |
- |
| GPRS |
No |
- |
| Speed |
- |
HSPA, LTE |
| Technology |
No cellular connectivity |
GSM / HSPA / LTE |
| |
- |
1, 3, 39, 40, 41 - China |
| Platform |
| Chipset |
Apple S2 (16 nm) |
Apple S4 |
| CPU |
Dual-core 780 MHz Cortex-A7 |
Dual-core |
| GPU |
PowerVR G6200 |
PowerVR |
| OS |
watchOS 3.0, upgradable to watchOS 6.2.8 |
watchOS 5.0, upgradable to watchOS 10.6.1 |
| Sound |
| 3.5mm jack |
No |
No |
| Loudspeaker |
Yes |
Yes |
