Dick, I was able to catch my Volt Spy with a camera. What I did was pulled down my Hots with the old VW. I had a 6v pack in it and other then getting the lights to flicker when I hit the snap roll switch nothing was going on. I changed the pack to a 4.8 then hit the snap switch. The lights would jump from dead low then go down and hold in the OK area. Very quickly so I was surprised I was able to catch it with the camera. This volt spy is very old and it is only a 4.8 volt. I usually run a 4.8 volt 2000mah in this plane but once in a while it will have a 6 volt pack, like now! I use a loaded meter most of the time before each flight, not always but most the time. I never trust the VW. I have the GEM 2000 {1000?} in my CG Extra, it tells you a bunch more if you take the time to memories the blinks and bother to look at it before flight. I have saved My Extra by accidentally looking at that light. The GEM {JEM}? costs more and I'm not sure if they are still made? I still have a couple of them.