Motorola HS801 用户手册

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First Time Use   Before you can use your headset, you need to charge its 
self-contained Li-ion battery for 24 hours.

After the battery is fully charged, the indicator LED will turn off. 

Do not charge for more than 24 hours.

It takes 1-1.5 hours 

to fully charge the battery. 

Recharging   When you hear 5 rapid beeps through the headset speaker, 
repeated at 20-second intervals, the headset battery needs to be charged. 
You could only use the headset for about 10 minutes after the beeps.

Over extended periods of time, batteries gradually wear down and require 
longer charging times. This is normal. 

The more you talk on the phone with the headset, the less standby time your 
battery has.