Samsung HM1500 Mode D'emploi page 9

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 Plug the small end of the travel adapter into the charger jack.
2 Plug the large end of the travel adapter into a power outlet.
During charging, the indicator light will turn red. If charging does not
begin, unplug the travel adapter and plug it in again.
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