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3. Charging the batteries
The unit’s battery must be recharged before use.
The accessory micro-USB cable must be used for recharging the unit’s battery.
Connect the appropriate connector on the accessory micro-USB cable to the
micro-USB port on the headphones, and the USB plug on the other end to a
USB port on a computer.
• When recharging begins, the LED indicator on the headphones will light red.
• If recharging is performed with the unit’s power turned ON, the power will auto-
matically turn OFF. The unit cannot be used during recharging.
• Full recharging requires about 4 hours; when recharging is completed, the LED
indicator will turn off.
• With a full battery charge, the maximum continuous usable time is about 15
hours.
• When the rechargeable battery’s power become low, a beeping sound can be
heard from the unit once every 3 minutes, and the LED indicator flashes red. In
this case, recharge the battery before using the unit.
Note
• Battery recharging time and usable battery time may vary depending on ambient
temperature and frequency of use.
• Do not place metal objects near the headphones’ charging contacts, since dan-
gerous electrical shorts or abnormal heating may result.
Notes on battery charging
• This device cannot be used during charging.
• Battery performance is influenced by the surrounding temperature. Charge the
supplied rechargeable batteries within a temperature range of 10 to 35 degrees
celcius.
• Do not overcharge batteries. In order to protect batteries, do not repeatedly
charge the batteries that are already fully charged.
• Batteries become slightly warm when charging. This is not a malfunction.
• Please use the accessory micro-USB cable for recharging; using other cables
may result in malfunction.
• Recharging may not be possible if computer is in power-saving mode.
• Always confirm the proper shape and orientation of the micro-USB cable plugs
before attempting to connect to the headphones and computer.
• Do not use micro-USB cables when tightly twisted or bundled, since fire or elec-
tric shock might result.
• If you do not plan to use this product for an extended period, avoid storing it in a
hot or humid location (such as in a vehicle or in direct sunlight). Storage in such
locations may degrade the rechargeable battery and shorten the usable time.
• If you do not plan to use this product for an extended period, charge it for approx-
imately one hour before storing it. Long periods of storage with a full battery
or without any charge may degrade the rechargeable battery and shorten the
usable time.
