118 | Tourguide 2020-D
Operation
10
5
4
2
LED color
Meaning
red
The built-in rechargeable battery is being charged�
green
The built-in rechargeable battery is fully charged�
red (flashing)
The temperature of the built-in rechargeable battery is over
40 °C or below 3 °C�
yellow/orange
The built-in rechargeable battery is defective� Interrupt the
charging process and contact your Sennheiser Service�
Notes:
• Charging a completely discharged rechargeable battery of the
HDE 2020-D-II takes approx� 2½ hours at room temperature�
• Charging a completely discharged rechargeable battery of the EK 2020-D-II
takes approx� 5 hours at room temperature�
• However, the charging process may take longer if:
• the rechargeable battery is deep discharged and first has to be recondi-
tioned by a deep discharge recovery charge,
• the temperature of the built-in rechargeable battery is over 40 °C or
below 3 °C, since, in order to protect the rechargeable battery, the
charging process will be interrupted until the temperature is again with-
in the permissible range (the LED
2
of the HDE 2020-D-II or the LED
4
of
the EK 2020-D flashes red)�
• An additional temperature protection prevents overheating inside the
charging case� If the temperature inside the charging case exceeds safety
limits, the charging process will be interrupted and will only be restarted
when the charging case has cooled down�
• When not using the receivers for extended periods of time, charge them
about every six months in order to prevent deep discharge damage to the
rechargeable batteries�