How to Charge Your Solar-Powered Watch
To ensure your solar watch maintains optimal performance, always expose the dial directly to a light source for charging. Even if the watch appears to have sufficient power, we recommend regular monthly charging to keep the battery level full and extend its overall lifespan. Below are different charging scenarios under various light sources, along with key points to note:
Effective Charging Conditions ✓
Scenario: Outdoors (Direct sunlight on a clear day)
Illuminance(lx): 100,000
Exposure Time: 4–6 hours
Charging Efficiency: ★★★★★
Scenario: By a window (Direct sunlight on a clear day)
Illuminance(lx): 30,000
Exposure Time: 6–8 hours
Charging Efficiency: ★★★★☆
Scenario: 30W Fluorescent Light
Illuminance(lx): 10,000
Exposure Time: 8–10 hours
Charging Efficiency: ★★★☆☆
⚠️ Reminders:
- Avoid overheating the watch during charging. (Operating temperature range: -10°C to +50°C)
- Make sure the dial, especially the chronograph sub-dials, is fully exposed to light when charging.
- When using the watch for the first time or restarting it after it has stopped due to low power, please refer to the "charging time guide" below to ensure the watch is fully charged before use.
Ineffective Charging Conditions ✘
Scenario: Watch covered by a sleeve
Illuminance(lx): 0
Exposure Time: N/A
Charging Efficiency: Ineffective
Scenario: Watch stored in a drawer
Illuminance(lx): 0
Exposure Time: N/A
Charging Efficiency: Ineffective
Scenario: On an office desk
Illuminance(lx): 500-700
Exposure Time: N/A
Charging Efficiency: Ineffective
⚠️ Your watch may stop working if:
- It is consistently covered by your sleeve during wear.
- It is used or stored in environments without exposure to light for extended periods.
- It relies solely on typical office lighting, which usually ranges from 500 to 700 lux depending on the type and height of the ceiling lights. This level of brightness is generally insufficient for stable charging over time.
Charging Time Guide
| Illuminance lx (Lux) |
Light Source | Condition (Example) | Charging from a fully depleted state | |
|---|---|---|---|---|
| Time to Full Charge | Time to Resume 1-Second Movement | |||
| 700 | Fluorescent Light | Standard Office | - | - |
| 3,000 | Fluorescent Light | 30W / 20cm distance | 80 hrs | 6 hrs |
| 10,000 | Fluorescent Light | 30W / 5cm distance | 40 hrs | 2 hrs |
| 30,000 | Sunlight | Sunny window side | 8 hrs | 1 hr |
| 100,000 | Sunlight | Direct sunlight (outdoors) | 6 hrs | 30 min |
Key Points
- Place the watch under direct bright sunlight for optimal charging performance. Charging may be ineffective on cloudy days.
- Avoid exposing the watch to high temperatures for extended periods.
- Check the charging status regularly to ensure the watch operates normally.