Hi folks, so I have a DECT headset for a 5300 series phone where the headset has been sitting in a drawer for a year (user thought it was lost). Battery currently has no charge. How do I get the thing to charge? We use 5360's and with the current firmware, it won't even let me part up the device to the phone. When i set it on the cradle the charging indicator does not blink on the base. Any tricks to jumpstarting the charge process?