Samsung BSP1000 User Manual page 13

3 Plug the large end of the charger into a power outlet.
While the speaker is charging, the icon will appear on the display.
4 When the speaker is fully charged (the icon is no longer moving),
unplug the charger from the power outlet and the speaker.
When the battery power is low
The speaker will emit a warning tone. If the speaker powers off during a
call, the call will automatically transfer to your phone.
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