I too am a big fan of the VoltWatch (and the several other similar devices), and put one on every flyable plane. I also include a "plane finder" which not only helps find planes that go down in the swamp, but also functions as a low voltage warning, giving me two indicators. On a high wing trainer, I put the Voltwatch just under the wing on the side opposite the exhaust. I like the idea of the VoltWatch under the canopy!

I have a question for those of you that have experience with the VoltWatch. What is the lowest light where you would fly? I noticed today after about 30 minutes of flying time, the Voltwatch was sitting with the third from the right light on, so I figured I'd call it a day. Obviously, you wouldn't fly with one of the three "low" lights on, but would you fly with the fourth from the right light on (the last ""safe" light)? In all cases, I'm talking about the state of the lightes with no servo activity.