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.
When the battery cannot be charged
Check that the headphones and your computer are firmly connected via the micro-USB cable (supplied).
Use only the supplied micro-USB cable. Do not charge the battery using any other USB cable.
Check that the computer is turned on and not in standby, sleep, or hibernation mode.
If the computer enters standby, sleep, or hibernation mode while the headphones are connected to the computer,
the POWER indicator turns off and the battery charge will not be completed properly. In this case, change the
computer settings and then charge the battery again.
Check that the headphones are directly connected to a computer using the micro-USB cable (supplied). Charging
may not be completed properly by an indirect connection, such as via a USB hub.
Battery life
*2
Approx. 7.5 hours
*2
*2
Time may vary depending on the immediate environment or conditions of use.
Hint
The battery can be charged via an AC outlet by using the recommended USB AC adaptor (AC-UD20) (sold
separately). Charging is completed in about 4 hours.
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.
For system requirements for a computer that can charge the battery using a USB, see ”Compatible operating
systems (Windows)” or ”Compatible operating systems (Mac).”
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