There are fourteen iterations of the Apple Watch.
Apple Watch (1st generation)

Variations
- Apple Watch
- Apple Watch Sport
- Apple Watch Hermès
- Apple Watch Edition
Hardware Specifications
Battery Specs
- 38mm
- Current: 205mAh
- Power: 0.78Wh
- Voltage: 3.80V
- 42mm
- Current: 246mAh
- Power: 0.93Wh
- Voltage: 3.78V
Firmware
- Initial firmware: 1.0 (12S507), 1.0 (12S507)
- Terminal firmware: 4.3.2 (15U70), 4.3.2 (15U70)
Apple Watch Series 1

Variations
- Apple Watch
Hardware Specifications
- CPU: Apple S1P SiP (Same CPU as the S2 but without the built-in GPS receiver)
- RAM: 512MB
- Storage: 8GB
- Wi-Fi: 802.11 b/g/n (2.4 GHz)
- Bluetooth 4.0
Battery Specs
- 38mm
- Current: 205mAh
- Power: 0.78Wh
- Voltage: 3.80V
- 42mm
- Current: 246mAh
- Power: 0.93Wh
- Voltage: 3.78V
Firmware
- Initial firmware: 3.0 (14S326), 3.0 (14S326)
- Terminal firmware: 6.3 (17U208), 6.3 (17U208)
Apple Watch Series 2

Variations
- Apple Watch
- Apple Watch Nike
- Apple Watch Hermès
- Apple Watch Edition
Hardware Specifications
- CPU: Apple S2 SiP (Same CPU as the S1P but with the built-in GPS receiver)
- RAM: 512MB
- Storage: 8GB
- Wi-Fi: 802.11 b/g/n (2.4 GHz)
- Bluetooth 4.0
Battery Specs
- 38mm
- Current: 273mAh
- Power: 1.03Wh
- Voltage: 3.77V
- 42mm
- Current: 334mAh
- Power: 1.27Wh
- Voltage: 3.80V
Firmware
- Initial firmware: 3.0 (14S326), 3.0 (14S326)
- Terminal firmware: 6.3 (17U208), 6.3 (17U208)
Apple Watch Series 3

Variations
- Apple Watch
- Apple Watch Edition
- Apple Watch Hermès
- Apple Watch Nike
Hardware Specifications
- CPU: Apple S3 SiP
- RAM: 768MB
- Storage: 8GB (GPS) or 16GB (GPS + Cellular)
- Wi-Fi: 802.11 b/g/n (2.4 GHz)
- Bluetooth 4.2
- Apple W2 Wireless chip.
- Qualcomm MDM9635 (GPS + Cellular models only)
Battery Specs
- 38mm (GPS)
- Current: 262mAh
- Power: 1.00Wh
- Voltage: 3.81V
- 38mm (GPS + Cellular)
- Current: 279mAh
- Power: 1.07Wh
- Voltage: 3.82V
- 42mm (GPS)
- Current: 342mAh
- Power: 1.31Wh
- Voltage: 3.82V
- 42mm (GPS + Cellular)
- Current: 352mAh
- Power: 1.34Wh
- Voltage: 3.82V
Firmware
- Initial firmware: 4.0 (15R610), 4.0 (15R610), 4.0 (15R607), 4.0 (15R607)
- Terminal firmware: 8.8.1 (19U512), 8.8.1 (19U512), 8.8.1 (19U512), 8.8.1 (19U512)
Apple Watch Series 4

Variations
- Apple Watch
- Apple Watch Hermès
- Apple Watch Nike
Hardware Specifications
- CPU: Apple S4 SiP
- RAM: 1GB
- Storage: 16GB
- Wi-Fi: 802.11 b/g/n (2.4 GHz)
- Bluetooth 5.0
- Apple W3 Wireless chip.
- Intel PMB9955 (GPS + Cellular models only)
Battery Specs
- 40mm
- Current: 224.9mAh
- Power: 0.858Wh
- Voltage: 3.810V
- 44mm
- Current: 291.8mAh
- Power: 1.113Wh
- Voltage: 3.814V
Firmware
- Initial firmware: 5.0 (16R364), 5.0 (16R364), 5.0 (16R364), 5.0 (16R364)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Series 5

Variations
- Apple Watch
- Apple Watch Nike
- Apple Watch Hermès
- Apple Watch Edition
Hardware Specifications
- CPU: Apple S5 SiP
- RAM: 1GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 GHz)
- Bluetooth 5.0
- Apple W3 Wireless chip.
- Intel PMB9955 (GPS + Cellular models only)
Battery Specs
- 40mm
- Current: 245mAh
- Power: 0.944Wh
- Voltage: 3.85V
- 44mm
- Current: 296mAh
- Power: 1.129Wh
- Voltage: 3.814V
Firmware
- Initial firmware: 6.0 (17R575), 6.0 (17R575), 6.0 (17R575), 6.0 (17R575)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch SE

Variations
- Apple Watch
- Apple Watch Nike
Hardware Specifications
- CPU: Apple S5 SiP
- RAM: ?GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4GHz)
- Bluetooth 5.0
- Apple W3 Wireless chip.
- Intel PMB9955 (GPS + Cellular models only)
Battery Specs
- 40mm
- Current: 245mAh
- Power: 0.944Wh
- Voltage: 3.85V
- 44mm
- Current: 296 mAh
- Power: 1.129 Wh
- Voltage: 3.184 V
Firmware
- Initial firmware: 7.0 (18R382), 7.0 (18R382), 7.0 (18R382), 7.0 (18R382)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Series 6

Variations
- Apple Watch
- Apple Watch Nike
- Apple Watch Hermès
- Apple Watch Edition
Hardware Specifications
- CPU: Apple S6 SiP
- RAM: ?GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.0
- Apple W3 Wireless chip.
- Intel PMB9955 (GPS + Cellular models only)
Battery Specs
- 40mm
- Current: 265.9 mAh
- Power: 1.024 Wh
- Voltage: 3.85 V
- 44mm
- Current: 303.8 mAh
- Power: 1.17 Wh
- Voltage: 3.85 V
Firmware
- Initial firmware: 7.0 (18R382), 7.0 (18R382), 7.0 (18R382), 7.0 (18R382)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Series 7

Variations
- Apple Watch
- Apple Watch Nike
- Apple Watch Hermès
- Apple Watch Edition
Hardware Specifications
- CPU: Apple S7 SiP (Same base CPU as S6)
- RAM: 1GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.0
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset (GPS + Cellular models only)
Battery Specs
- 41mm
- Current: 2.84 mAh
- Power: 1,094 Wh
- Voltage: 3.85 V
- 45mm
- Current: 309 mAh
- Power: 1,189 Wh
- Voltage: 3.85 V
Firmware
- Initial firmware: 8.0 (19R346), 8.0 (19R346), 8.0 (19R346), 8.0 (19R346)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch SE

Variations
- Apple Watch
Hardware Specifications
- CPU: Apple S8 SiP (Same base CPU as S7 and S6)
- RAM: 1GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.3
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset (GPS + Cellular models only)
Battery Specs
- 40mm
- Current: ? mAh
- Power: ? Wh
- Voltage: ? V
- 44mm
- Current: ? mAh
- Power: ? Wh
- Voltage: ? V
Firmware
- Initial firmware: 9.0 (20R361), 9.0 (20R361), 9.0 (20R361), 9.0 (20R361)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Series 8

Variations
- Apple Watch
- Apple Watch Hermès
Hardware Specifications
- CPU: Apple S8 SiP (Same base CPU as S7 and S6)
- RAM: 1GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.3
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset (GPS + Cellular models only)
Battery Specs
- 41mm
- Current: 282 mAh
- Power: ? Wh
- Voltage: ? V
- 45mm
- Current: 308 mAh
- Power: ? Wh
- Voltage: ? V
Firmware
- Initial firmware: 9.0 (20R361), 9.0 (20R361), 9.0 (20R361), 9.0 (20R361)
- Latest public firmware: 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360), 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Ultra

Variations
- Apple Watch
Hardware Specifications
- CPU: Apple S8 SiP (Same base CPU as S7 and S6)
- RAM: 1GB
- Storage: 32GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.3
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset
Battery Specs
- 49mm
- Current: 542 mAh
- Power: 2.1 Wh
- Voltage: 4.47 V
Firmware
- Initial firmware: 9.0 (20R8363)
- Latest public firmware: 10.0.1 (21R360)
- Latest beta firmware: 10.1 beta (21S5042f)
Internal Names: Watch6,18
Apple Watch Series 9

Variations
- Apple Watch
- Apple Watch Hermès
Hardware Specifications
- CPU: Apple S9 SiP
- RAM: ?GB
- Storage: 64GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.3
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset (GPS + Cellular models only)
Battery Specs
- 41mm
- Current: 282 mAh
- Power: 1.091 Wh
- Voltage: 3.869 V
- 45mm
- Current: ? mAh
- Power: ? Wh
- Voltage: ? V
Firmware
- Initial firmware: 10.0 (21R355), 10.0 (21R355), 10.0 (21R355), 10.0 (21R355)
- Latest public firmware: 10.0.2 (21R371), 10.0.2 (21R371), 10.0.2 (21R371), 10.0.2 (21R371)
- Latest beta firmware: 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f), 10.1 beta (21S5042f)
Apple Watch Ultra 2

Variations
- Apple Watch
Hardware Specifications
- CPU: Apple S9 SiP
- RAM: ?GB
- Storage: 64GB
- Wi-Fi: 802.11 b/g/n (2.4 and 5GHz)
- Bluetooth 5.3
- Apple W3 Wireless chip.
- PMB9955 LTE Baseband Chipset
Battery Specs
- 49mm
- Current: 564 mAh
- Power: 2.178 Wh
- Voltage: 3.862 V
Firmware
- Initial firmware: 10.0 (21R355)
- Latest public firmware: 10.0.2 (21R371)
- Latest beta firmware: 10.1 beta (21S5042f)
Internal Names: Watch7,5