Sennheiser 2020 manual The LED

Charging the receivers’ built-in rechargeable batteries

Place the receiver into one of the charging compartments for receivers (slaves) .

The LED	lights up (see table).
Color of LED	Meaning
red	The built-in rechargeable battery is being
	charged.
green	The built-in rechargeable battery is fully
	charged.
	The temperature of the built-in
red (flashing)	rechargeable battery is over 43 °C
	or below 3 °C.
yellow/	The built-in rechargeable battery is
	defective. Interrupt the charging process
orange
	and contact your Sennheiser agent.

Charging a completely discharged rechargeable battery takes approx. 2½ hours at room temperature.

However, the charging process may take longer if:

ythe rechargeable battery is deep discharged and first has to be reconditioned by a deep discharge recovery charge,

ythe temperature of the built-in rechargeable battery is over 43 °C or below 3 °C, since, in order to protect the rechargeable battery, the charging process will

be interrupted until the temperature is again within the admissible range (the LED flashes red).

After the built-in rechargeable battery has been fully charged, the LED lights up green.

Notes:

y 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.

yWhen 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.

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