Take your headset off the base and remove the power cord from your base
Remove the battery from your headset for 30 seconds, then slide the battery back in
Plug the power cord back in and hold down the telephone mode button on your charging base until it starts to flash
Now hold down the mute button on your headset until the headset starts to flash as well
After a few moments, your headset and charging base will stop flashing. Put your headset back in the charging base and you should see the battery lights on your base light up once again