Leica BLK2GO User Manual page 26

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Insert the battery with the contact slots facing downwards.
The LED of the battery bay blinks orange
process.
Refer to "LED indicators".
If the LED of the battery bay lights solid green
charged.
Disconnect the charger plug from the DC input of the charger.
Unplug the AC/DC power adapter from the AC power source.
Carefully pull the battery upwards.
The LED indicator of the battery bay is off
indicating the charge
the battery is fully
.
Power Supply