Battery charging hub calibrate (?) button

[a friedrich]

Does anybody know how the proper use / function of the calibration button (?) on front of the new battery hub?
My charger came without a manual, when pressing the button there is either a single beep or a double beep...
Many thanks, Alexander

[soerekr]

Copied from the X1D II manual:

Front-facing LEDs indicate status and capacity when charging, or users can use the Battery Charging Hub to check battery levels simply by inserting a battery and pressing a single button.

regards,
Kristian

[mar-ko]

Alexander,
a) the manual is "hidden" in the box under the main charger; maybe you just did not see it...
b) the button is not for calibration; a short press displays the current status of the batteries, a press of more than 5 seconds changes the "beep mode": one confirmation beep indicates "silent mode" (default), two confirmation beeps indicate, that the charger will beep, when a battery has been fully loaded.

HTH  Marko

[a friedrich]

Thank you both! I was unaware that the latest X1D manual covers the charging hub already - the manual is indeed well hidden in the box... 
Kind regards! Alexander