* I would click it on and it would (maybe) come on for maybe a minute then it would die. There were two episodes whereas the body of the Headlamp would heat up considerably but would not emit light. And finally the headlamp would not come on at all.
* Freshly charged Eneloops and also tried freshly charged NIMHS.
* Not quite sure what you mean by your last question? I clicked it on and it did not work as advertised.
I thought maybe it just wasn't coming on, so I was curious if you cleaned the thread, tried another battery, etc. Definitely sounds like a defective light. MojaveMoon07 saw what I missed; they are just back ordered and they are usually picky on tint, so if they are waiting for a new batch of LEDs or swamped with Christmas orders, it could take a month before they get a new batch. I definitely don't think they will discontinue the H502 series until they improve something.
Edit: if you're lucky, they'll add 14500 support like the SC52