Are you a study participant?
If you are a Study Participant, contact your Administrator directly as information in the Support Center is intended for qualified researchers and healthcare professionals. Misapplying the information below may affect your data collection.

E4 wristband doesn’t power up, what can I do?

If your E4 wristband doesn’t power up when you press the button or connect it to the charger, your device might have been affected by a glitch that temporarily prevents the wristband from powering on. If you’ve encountered this issue, please try the following steps:

- Press the E4 button and keep it pressed for about 30 seconds
- Leave the device for about 5 minutes
- Then push the button for 1 second - at this point it should start working normally
- If it doesn’t, connect it to the charger and plug it to the computer.


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