Possible reasons:
1. The charging dock is not properly connected to the power source.
2. There are stains or dirt at the charging port where the lawn mower connects to the docking station, causing poor contact.
3. The battery temperature is either too high or too low, triggering battery protection.
4. The battery is over-discharged.
We recommend trying the following:
1. Ensure the charging dock is plugged into a power source.
2. Check the charging port for any dirt or stains and clean it.
3. Once the lawn mower's temperature returns to normal, attempt charging it again.
4. Contact Hookii Customer Service for assistance if the issue persists.