Step 00
1435 - Check BT-DU3 battery
Check BT-DU3 battery
1577 - Momentarily press the POWER button on the BT-DU3 to view the battery charge; ...
Momentarily press the POWER button on the BT-DU3 to view the battery charge; all 6 LEDs illuminated indicates full battery. BT-DU3 battery is also indicated on App.
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