This Eco-Drive watch uses a solar panel to convert sunlight into electricity, and also has a perpetual calendar, daily alarm and timer.
This manual explains how to operate and maintain the Casio E81*/E82* solar (Eco‑Drive) watch. It covers charging the rechargeable battery, setting the time, date, alarm, timer and local time, and explains the power‑saving and low‑power warnings.
Additional sections describe the watch’s water‑resistance ratings, cleaning and maintenance tips, and safety warnings for high‑temperature or magnetic environments. This manual is written in Chinese.
| Watch type | Solar (Eco‑Drive) analog watch |
|---|---|
| Time accuracy | ±15 seconds per month (±15秒/月) |
| Operating temperature range | -10 °C to +60 °C |
| Battery | One rechargeable battery |
| Power reserve (full charge) | ≈9 months (E81*) / ≈8 months (E82*) |
Place the watch in direct sunlight for 5–6 hours each month, or expose it to indoor lighting for about 4 hours daily.
When the seconds hand points to CHARGE, the watch is low on power and needs charging.