Two light LEDs may be blinking white on the Ultimate Ears Wonderboom 3. There’s the Bluetooth pairing lamp. Also there’s the charging lamp, in the Power button. These are both on the top of the unit. The pairing lamp blinks when pairing mode is active, and the charge lamp blinkss when the Ultimate Ears Wonderboom 3 is charging. Details on both of these blinking white lights follow.
Ultimate Ears Wonderboom 3 Blinking White Light: Pairing Mode Active
When the Pairing button blinks white, the Ultimate Ears Wonderboom 3 is in discovery or pairing mode.
Ultimate Ears Wonderboom 3 Blinking White Light: During Charging
The Power lamp flashes white while the Ultimate Ears Wonderboom 3 is recharging.
This light pulses in a gradually dimming and brightening pattern. On this speaker, this LED is the only visual indication that charging is happening. But it does not tell how far along the charging is.
It blinks during charging whether the 3 is OFF or ON.
As charging continues, the light keeps slowly blinking white. Furthermore, battery recharging is over when the lamp goes out, or turns solid white. It turns OFF when the speaker is OFF, and switches to a solid white glow when the speaker is ON.
The battery recharge cycle finishes when the speaker status lamp turns OFF. Even with the AC charger running, the lamp does not glow when battery is full. Not unless the speaker itself is running.