In the interest of full disclosure, science, and confused headlamp people everywhere, I'll provide an update to the problem that I described in my original post.
I made a discovery. As it turns out, my biggest problem with the AAA headlamps was the batteries that I was using. Even though they were not all the same brand, they were apparently pretty weak. All normal, new AAA batteries. Probably 12 - 16 in total by now. Same poor results in all cases.
I finally bought some rechargeable AAA batteries. Duracell, because I'm either bold or stupid. So far, the results are amazing. The crappy little headlamps have been transformed into completely new lights. Very bright. As for longevity, I don't know yet. I hope they last longer than the old AAA batteries, and if so, the whole problem is solved.
After reading all the good reviews of the lithium headlamps in this thread and others, I suspect one of those is in my future, but this little AAA headlamp -- armed with rechargeable batteries -- will do the trick for now.
Tom
I made a discovery. As it turns out, my biggest problem with the AAA headlamps was the batteries that I was using. Even though they were not all the same brand, they were apparently pretty weak. All normal, new AAA batteries. Probably 12 - 16 in total by now. Same poor results in all cases.
I finally bought some rechargeable AAA batteries. Duracell, because I'm either bold or stupid. So far, the results are amazing. The crappy little headlamps have been transformed into completely new lights. Very bright. As for longevity, I don't know yet. I hope they last longer than the old AAA batteries, and if so, the whole problem is solved.
After reading all the good reviews of the lithium headlamps in this thread and others, I suspect one of those is in my future, but this little AAA headlamp -- armed with rechargeable batteries -- will do the trick for now.
Tom