I got two of these drivers in together with a couple of xhp35 hi.
I installed one of them in a convoy s11.(forward clicky)
In the first mode I hear a whining noise which is pretty loud. After a couple of seconds it skips the first mode and goes to the second without doing anything. It makes a strange electronic sound for a very short time when it bums up to second mode.
Its mostly after 10sec but sometimes takes 20sec. It always does this.
I tried it with the lamp hot, cold, different battery, different switch(from second s11) but I cannot find the problem. If i shake the light nothing happens. It does not go from second to third mode automaticly. Both springs are bypassed and bypass is securly in place. I placed a small piece of that blue thermal silicone one the square thats on the driver to give it beter heat transfer to the body of the light.
I found that this driver is very sensitive to less than perfect electrical connections, resulting in coming alive by itself: try cleaning the battery tube ends and corresponding contact surfaces with a cloth and screw everything together well. That solved some problems for me at least.
I get whining noise at the highest mode btw, that did not go away.