My one and only Zebralight was a piece of junk. Bought a brand new H-51 which crapped out after about 2 hours of use. It would turn on in the pocket because of the switch and woukd get WAY too hot to hold. POS. I’m sure they are not all that bad but for the price, my Ultrafire is miles ahead. Even at twice the price, I think the Ultrafire is better.
Sounds like you got a dud to me. Did they not take care of you when you returned it?
I love my Zebralight.