Using The Headphones; Charging The Headphones' Rechargeable Battery - Sennheiser PXC 550-II Instruction Manual

Using the headphones

Information on the rechargeable battery and the charging process
The headphones have a built-in rechargeable battery. A complete charging cycle takes about 3 hours.
The headphones provide 1.5 hours of playback time with a charging time of approx. 10 minutes.
Before using the headphones for the first time, charge the rechargeable battery for a complete
charging cycle without interruption.
When the headphones are being charged, the LED lights up (>
the battery charge drops to a critical level, a voice prompt asks you to recharge the headphones
("Recharge headset").
Sennheiser recommends using the supplied USB cable and a compatible standard USB power supply
for charging the headphones.
While the headphones are being charged, you can still listen to music or make phone calls. In this
case, however, the charging time may be longer.

Charging the headphones' rechargeable battery

1.Connect the micro USB connector of the charging cable to the micro USB socket of the headphones.
2.Connect the other USB connector of the charging cable to a corresponding socket of a USB power
source (* to be ordered separately). Make sure that the USB power source is connected to the power
supply system.
The charging process of the headphones begins. The LED displays the charge status:
LED
1 red
Meaning
Rechargeable battery is almost empty
(less than 2% charged)
Overview of the LED display). When
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