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HT41866-Q – Power & Charging Guide
The two NB16-Q headphones have rechargeable batteries. The Audikast-3 transmitter must remain connected to power while in use.
NB16-Q Headphones
Rechargeable batteries. Charge each pair using the provided USB-C cable.
Audikast-3 Transmitter
No built-in battery. Keep it connected to USB power while using it.
How to Charge the Headphones
Connect the provided USB-C charging cable to the headphones, then connect the other end to a USB power source.
Solid RED = Charging
LED OFF = Fully charged
- A full charge takes approximately 2.5 hours.
- A full charge provides up to 20 hours of use at approximately 60% volume.
- Quick charge: Approximately 15 minutes of charging provides up to 3 hours of use.
How to Power the Audikast-3 Transmitter
- Connect the provided USB-C cable to the transmitter.
- Connect it to your TV’s USB port or a compatible USB wall adapter.
- Move the transmitter’s power switch to ON.
- Keep the transmitter connected to power while using it.
Frequently Asked Questions
Can I Use the Headphones While Charging?
Yes. You can use the headphones while they are connected to the charging cable.
Do I Have to Wait Until the Battery Is Low?
No. You can recharge the headphones at any time.
What Charger Should I Use?
Use the provided cable with a standard 5V / 1A or 5V / 2A USB charger. Do not use a charger above 2A.
Why Does the Transmitter Not Hold a Charge?
This is normal. The transmitter has no built-in battery and must remain connected to USB power while in use.
Something Doesn’t Look Right?
Headphones Are Not Charging
- Unplug and reconnect the USB-C cable.
- Make sure the cable is fully inserted.
- Try another USB power source.
- Try another USB-C cable.
Transmitter Will Not Turn On
- Make sure the USB-C power cable is securely connected.
- Try another USB power source.
- Move the transmitter’s power switch to ON.
Need More HT41866-Q Help?
See all setup and troubleshooting guides for this product.
Still Having Trouble?
Contact the Avantree support team for additional assistance.
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