Charging the battery via an AC outlet
The battery can be charged via an AC outlet by using the recommended USB AC adaptor (AC-UD20) (sold separately). For details on the adaptor, refer to its operation manual.
- Press and hold the POWER button for about 2 seconds until the POWER indicator shuts off to turn off the headphones.
- Connect the micro USB port (Type B) (
PC/CHARGE) of the headphones and the USB AC adaptor (AC-UD20) (sold separately) using the micro-USB cable (supplied), then connect the USB AC adaptor to an AC outlet.
The POWER indicator lights up in red while the battery is being charged and the indicator turns off when charging is completed.
Charging is completed in about 4 hours*1.
If the battery is not charged properly, the POWER indicator will flash in red.
*1 Time required for empty battery to recharge.
Battery life*2
Approx. 7.5 hours*2
*2 Time may vary depending on the immediate environment or conditions of use.
Note
- When the headphones had not been used for a long time, it may take a while for the POWER indicator to light up in red. In this case, do not disconnect the micro-USB cable from the headphones. Wait until the POWER indicator lights up in red.
- Charge in an environmental temperature of between 5°C and 35°C. Otherwise, the battery may not fully charge.
- If the battery is fully charged, the POWER indicator may blink and go off, and charging may not start. This is not a malfunction.
- When storing the headphones for a long time, avoid a place subject to high temperatures. When storing the headphones for more than a year, charge the battery every six months to prevent over discharge.
- If you haven’t used the headphones for a long time, the life of the rechargeable battery may become short. This will improve when you repeat the charging and discharging process several times.