Samsung HM1600 Mode D'emploi page 8

Charging the headset
This headset has a rechargeable internal battery which is non-removable. Ensure
that you fully charge the battery before using the headset for the first time.
1 Connect the travel adapter to the headset (see below image).
2 Plug the travel adapter in to the wall outlet.
During charging, the indicator light will turn red. If charging does not begin,
unplug the travel adapter and plug it in again.
3 When the headset is fully charged, the indicator light changes to blue. Unplug
the travel adapter from the power outlet and the headset.
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