Nokia BH-940 - Manual (Page 6)

2 When the battery is full and the yellow indicator light turns green, do the following:
Tip: You can also charge the headset from your computer with a compatible USB
cable.
With a wireless connection, the fully charged battery has power for up to 24 hours of
talk time or 24 hours music playing time, or up to 7 days of standby time.
When the battery charge is low, you hear a periodic voice prompt or beep, and the
yellow indicator light flashes.
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