Sennheiser HD 4.50 BTNC Owner's Manual
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HD 4.50BTNC
Getting started
Getting started
Charging basics
A complete charging cycle takes about 2 hours. Before using the headphones
for the first time, charge the headphones for a complete charging cycle without
interruption.
for the first time, charge the headphones for a complete charging cycle without
interruption.
When being charged, the LED lights up as indicated in the following table. When
the battery charge drops to a low level, a voice prompt asks you to recharge the
headphones.
the battery charge drops to a low level, a voice prompt asks you to recharge the
headphones.
It is recommended to charge the headphones using only the supplied USB
cable. If you charge the headphones using an external USB power adapter, it
is recommended to use an adapter with an output rating of 500 mA or higher.
cable. If you charge the headphones using an external USB power adapter, it
is recommended to use an adapter with an output rating of 500 mA or higher.
LED
Meaning
Voice prompt
Battery is almost empty
(less than 2 % charged)
(less than 2 % charged)
“Recharge headset“
Battery is less than 11% charged
“Less than 2 hours
play time“
Battery is less than 23% charged
“Between 2 and 6 hours
play time“
Battery is less than 45% charged
“Between 6 and 12 hours
play time“
Battery is more than 45% charged
“More than 12 hours
play time“
5 m
Battery is fully charged
“More than 12 hours
play time“
2h