As discussed in the original Zebralight Reliability thread, here's a revised poll with more refined parameters. It's still not exactly scientific, but hopefully this will give us a better idea about whether only certain Zebras tend to go bad or they all do.
I've limited the poll to Zebralight headlamps which are currently available to purchase. So the H50, the H30, and both versions of the H60 are not included as they are generally not available. I have included the H502 for any future users. Multiple selections are allowed in case you've owned multiple models.
Also, this is not a thread about Zebra's customer service. Please limit any rants to the reliability of the Zebralights themselves and rant elsewhere about how disappointed you were with their communication or shipping times
The poll will close at the end of the year, so hopefully it won't be resurrected years later by some disgruntled Zebra customer.
Note: In the poll I identified the second gen H501 as having a press fit switch. I realize that this may be erroneous. I'm not sure how exactly the switch ring is attached. Just know that by that I meant the second gen H501. Sorry.
Note 2 (1/14): as per post #20-22 below, THIS POLL DOES NOT EXCLUDE THE DEFECTIVE BATCH OF EARLY H501'S. I was mistaken about the H501 having two different versions of the switch ring. I thought that the H501 with the permanent switch ring was a second version and that there was a first version with a screw down switch ring. However, the Zebra H501 seems to have always had a permanent switch ring. The phantom "first version" seems to just have been a figment of my imagination*. I thought that including only what I believed to be the newer generation of H501 would exclude the defective batch of early H501's, but instead I've probably only succeeded in confusing a bunch of people. I'm sorry about that. I can't make changes to the poll. As a result, this poll is even more flawed than initially thought. I think it still has value concerning the other models (H51, H31, H600, and in the future the H502), but the info regarding the H501 is probably useless. Again, I offer my sincerest apologies.
*i'm not sure exactly where this idea came from. it likely has something to do with the H60 having two different versions of switches. i might have even gotten the Zebra H501 confused with the Ultrafire UF-H2 - the UF-H2 has a screwed down switch ring. I don't know.