To change the batteries of your Blood Pressure Monitor:
- Make sure the Blood Pressure Monitor is turned off.
- Use a coin to turn the battery cover counterclockwise and remove the cover.
- Replace the batteries.
- Put the cover back in place.
https://support.withings.com/hc/en-us/sections/6215924284945-Wired-Blood-Pressure-Monitor-iOS
https://support.withings.com/hc/en-us/sections/115001289068-Maintenance