If the Nox T3 recorder has not been in use for a long time, approximately 6 months, the internal battery may have run out and the Nox T3 recorder is set to factory date. To load the internal battery, plug the Nox T3 recorder to the computer via USB cable for about one hour. To be sure the battery is fully charged leave the device plugged in overnight.
Note: This does not apply to Nox T3s recorders. The internal battery of Nox T3s is a non-chargeable lithium battery.