1. Check if the battery’s positive (+) is facing upwards when inserted.
2. Replace with a new battery. 

If there are wounds or other issues making it difficult to attach the S-Patch at the recommended location, you can attach it near the recommended area. 

S-Patch uses commercial CR2032 3V lithium coin battery.
Use the provided battery cover opener or coin when opening/closing the battery cover.

1. Open the battery cover (ECG signal designed back cover) by turning it counterclockwise.
2. Remove the existing coin battery and insert a new battery with the positive side looking outward.
3. Close the battery cover and turn it clockwise. 

S-Patch serial number is 6-digit, printed on the back of the device. 

1. Check if the device is powered on.
2. Check if Bluetooth and Location settings on your phone are turned on.


*How to check if S-Patch is powered on
Press the device’s power button once lightly. If you see the blue LED flash, your S-Patch is powered on. 

Check if the S-Patch is attached in the correct direction. The power side of the S-Patch should be positioned upwards. 

The duration of S-Patch attachment may vary depending on the purpose of the test and the prescription of the medical staff. The usage period of the S-Patch is typically up to 3~4 days per test based on S-Patch Ex device standards. 

Yes . S-Patch is waterproof (IP55) against low-pressure sprayed water. But we recommend you take S-Patch off during the shower because electrodes are not waterproof so will weaken the adhesive. 

When your S-Patch is functioning well, you will not see any flashing lights or hear any noise. If you started the test with S-Patch Ex app, you can check the live ECG graph, bluetooth connection status, and remaining battery level on the app. 

Please check if the electrodes are not dried-out. 


Do not reuse electrodes and replace with new ones. If the adhesion of the electrode pad is poor, it may affect the test recording. 

When using the S-Patch Ex app, the connection may become unstable if the distance between the patch and the phone exceeds a certain distance.
If you see the ‘Reconnect’ button on the screen:

1. Press the ‘Reconnect’ button.
2. If not connected, ensure that the device and phone are close together and check if Bluetooth on the phone and the device’s power are turned on, then try reconnect.
3. If the ECG signal is not visible, try force closing the app, turning off/on Bluetooth, and then checking again. 

If you started the test with S-Patch Ex app, click ‘Add Symptom’ button or add patient diary. 

You can continue the test by replacing the battery. After replacing the battery, turn on the power and check the connection between the patch and the phone.

Once the prescribed test duration ends, the data is automatically sent to the cloud server. If the upload is not done automatically, you can manually send it by pressing the ‘Send Data’ on the app.