What should I do if Curtain 4 or the extended battery cannot be charged? – SwitchBot Help Center

Please use a 5V⎓1A adapter and power cord to charge the device.
When the device temperature is below 0℃ or above 45℃, the device will limit charging. Please continue charging after the temperature recovers.
If the console does not respond, it may be that the battery is too low and it shuts down. Please remove the expansion battery first and charge the console separately.
The host computer and the expansion battery have different lighting effects. When the main unit is fully charged, the LED light stays on, and when the expansion battery is fully charged, it turns off.
If you have any questions, please contact us via SwitchBot App > Profile > Help & Feedback > Feedback.