Samsung HM6400 - Manual (Page 11)

English
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When the headset is fully charged, the battery icon stops scrolling. Unplug the 3.
travel adapter from the headset.
Use only Samsung-approved chargers. Unauthorised chargers may cause an •
explosion or damage to the headset.
Over time, after many charging and discharging cycles, battery performance will
•
diminish. This is normal for all rechargeable batteries.
When a call comes in while charging, disconnect your headset from the travel
•
adapter and answer the call.
When the headset battery is low
The headset beeps and the Battery icon is empty and blinking. Recharge the
battery. If the headset powers off during a call, the call will be automatically
transferred to the phone.