Originally posted by and I did. This doesnt change anything. Remember it actually says in the manual that the remote will stop working after 5 minutes.
The big if is with no remote activity. I might try some things to extend the time without taking a shot. One that comes to mind is pressing the remote half way, as if trying to focus. Maybe the timer is based on receiving a signal, any signal, from the remote. It is still a pain to have to keep pressing the remote every not-quite-five minutes, but better than having to walk over to the camera and set it up again.