Dimensions
Size comparison
C9CS1
| C9 | CS1 | Difference | |
|---|---|---|---|
| Height | 43 mm | 41.5 mm | +1.5 mm |
| Width | 43 mm | 35.9 mm | +7.1 mm |
| Thickness | 10 mm | 8.9 mm | +1.1 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is C9 better than CS1?
- Pixel density265 ppi vs 242 ppi+10%
- Battery capacity210 mAh vs 200 mAh+5%
Why is CS1 better than C9?
- Screen size1.28″ vs 1.4″+9%
- Thickness10 mm vs 8.9 mm+12%
Specifications
Side by side
| Design & durability | ||
| Case size | 43 mm | 42 mm |
| Weight | — | 45 g |
| Thickness | 10 mm | 8.9 mm |
| Height | 43 mm | 41.5 mm |
| Width | 43 mm | 35.9 mm |
| Case material | — | Plastic / polymer |
| Lens / cover glass | Scratch-resistant glass | — |
| Ingress protection | IP68 | IP68 |
| Water resistance (IPx) | IPx8 | IPx8 |
| Colours | Black, Blue, Pink | Graphite Black, Space Gray |
| Display | ||
| Screen size | 1.28″ | 1.4″ |
| Display technology | LCD | LCD |
| Panel | IPS LCD | IPS LCD |
| AMOLED / OLED display | No | No |
| Resolution (width) | 240 px | 240 px |
| Resolution (height) | 240 px | 240 px |
| Pixel density | 265 ppi | 242 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery capacity | 210 mAh | 200 mAh |
| Battery type | — | Li-Ion |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Sensors | Accelerometer, gyro, heart rate | Accelerometer, heart rate |
| Sports & navigation | ||
| Built-in GPS | No | No |
| Connectivity | ||
| NFC payments | No | No |
| LTE (cellular) | No | No |
| eSIM | No | No |
| Bluetooth | 5 | 4 |
| Smart features | ||
| Speaker | No | No |
| Platform | ||
| Operating system | Proprietary OS | Proprietary |
| Platform | Proprietary | Proprietary |
| Chipset | — | nRF52832 |
