Audio-Technica ATH-CKS990BT Manuel De L'utilisateur page 6

Charging the battery
• Fully charge the battery when using for the first time.
• When the rechargeable battery is running low, the product will sound 2 sets of 2 beeps through the headphones, and
the indicator lamp will flash in red. When these beeps sound, charge the battery.
• It takes about 3 hours to charge the battery fully. (This time may vary depending on usage conditions.)
• While the battery is charging, the product's Bluetooth connection remains disabled and therefore the product cannot be
used.
1. Open the battery jack cover.
2. Connect the USB charging cable (micro USB terminal side) to the battery jack.
3. Connect the USB charging cable (Type A side) to the computer to start charging.
• You can also use a USB-compatible AC adapter (sold separately) to charge the battery by using a power outlet.
4. During charging, the indicator lamp lights as follows:
Lit in red : Charging
Lit in blue : Charging complete
5. When charging is complete, disconnect the USB charging cable (Type A side) from the computer.
6. Disconnect the USB charging cable (micro USB terminal side) from the battery jack and close the cover firmly.
6
USB port
Computer
Battery jack
Type A
USB charging cable (included)
Micro USB terminal