Apple Watch Series 9 Aluminum 41mm GPS vs Apple Watch Series 4 Aluminum 40mm - mobile2u.net
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| Display Size | 1.69 inches | 1.57 inches |
| Display Type | Retina LTPO OLED | Retina LTPO OLED |
| Resolution | 430 x 352 pixels | 394 x 324 pixels |
| Protection | Ion X strengthened glass | Ion X strengthened glass |
| RAM | 1GB | 1GB |
| Storage | 64GB | 16GB |
| Chipset | Apple S9 | Apple S4 |
| CPU | Dual core | Dual core |
| GPU | PowerVR | PowerVR |
| Battery | 282 mAh Li-Ion | 225 mAh Li-Ion |
| Wireless Charging | (Qi) | (Qi) |
| OS | watchOS 10 | watchOS 10 |
| Bluetooth | 5.3 | 5.0 |
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