Nokia BH-304 ユーザーズマニュアル

and press and hold the power key 
and the answer/end key until the red 
and green indicator lights start to 
alternate.

To reset the headset if it stops 
functioning, although it is charged, 
plug the headset into a charger, and 
press the power key and the answer/
end key at the same time.

Your device is powered by a 
rechargeable battery. The battery can 
be charged and discharged hundreds of 
times, but it will eventually wear out. 
Recharge your battery only with Nokia 
approved chargers designated for this 
device.

Unplug the charger from the electrical 
plug and the device when not in use. Do 
not leave a fully charged battery 
connected to a charger, since 
overcharging may shorten its lifetime. 
If left unused, a fully charged battery 
will lose its charge over time.

Never use any charger that is damaged.

Leaving the device in hot or cold places, 
such as in a closed car in summer or 
winter conditions, will reduce the 
capacity and lifetime of the battery. 

Always try to keep the battery between 
15°C and 25°C (59°F and 77°F). A device 
with a hot or cold battery may not work 
temporarily, even when the battery is 
fully charged. Battery performance is 
particularly limited in temperatures 
well below freezing.

Do not dispose of batteries in a fire as 
they may explode. Batteries may also 
explode if damaged.