Samsung HM3500 Manual page 8

3 When the headset is fully charged, the red indicator light changes to blue.
Unplug the travel adapter from the power outlet and the headset.
• Use only a Samsung-approved travel adapter. Unauthorised travel adapters
may cause an explosion or damage to the headset.
• The battery will gradually wear out while charging or discharging because
it is a consumable part.
• When a call comes in while charging, disconnect your headset from the travel
adapter and answer the call.
When.the.battery.power.is.low
The headset beeps when the battery power is low. When this happens, recharge
the battery. If the headset powers off during a call, the call will automatically transfer
to your phone.
Checking.the.battery.level
At the same time, press and hold the Volume down and the Talk button. Depending
on the battery level, the indicator light flashes 5 times in one of the following colours:
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