https://www.medel.com/hearing-solutions/accessories/remote-controls/audiokey2 Watch how to check RONDO 3’s battery status using the AudioKey 2 app.
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AudioKey 2 Hands-On: Checking RONDO 3’s Battery Status | MED-EL
https://www.medel.com/hearing-solutions/accessories/remote-controls/audiokey2 Watch how to check RONDO 3’s battery status using the AudioKey 2 app.
source