Guess I need to start shopping for batteries!
The saber connected fine, first try with charged batteries. I was messing around with settings and then I had no light whatever! Went back to the video US posted and found my problem. I thought I messed the slider at the bottom up so I moved it back to 0. No power to the LEDs = no light! Moved that back to 100% and I'm back in operation.
I'm going to run the batteries out tonight; just leave the thing on for a while, then put them back on the charger and do it again. I've had some luck doing that with other LiPos that I use.
I have no doubt that US would take care of me if I had a problem; I just want to be sure it is a real problem before contacting them. So far everything has been a fault on my own end, not with the saber.