I've powered up my "new" TX and restored the previous NVBackup cycle. Everything is looking good so far. In fact, one issue I had with my previous TX was a light leak along the right side of the screen. This device doesn't seem to have that (or it's barely noticable). I checked the date of manufacture based on S/N and compared it to my "old" TX. The old one was manufactured Monday, 12/19/2005. The "new" one was built Tuesday, 01/17/2006, only a month later! That means it's over a year old, so I don't think I gained anything on the battery life.