Last night I received a pair of Orbtronic 3100mAh 18650's from Amazon. They charged with no issues up to 4.19v and I put one in my Armytek Predator v1 that had previously been running off of 2 CR123A's. However, when I turned it on low mode (Default 7 lumen pre-programmed setting) it stayed in a state of flickering.
Some background info: my light (and I'm pretty sure everybody else's) would flicker for about half a second when entering the 7 lm mode. It pretty much looks like the same flickering that had been present with every other battery type, but instead of only lasting less than a second it keeps going. It isn't quite as constant as usual; sometimes it will stay on solidly for a few seconds before falling back into the flickering state.
The light works fine with my Solarforce 2400mAh Protected 18650's (tried at 4.13v) and Tenergy CR123A's, but both Orbtronics have this same problem. Since noticing the issue I've left the Predator on in 7 lm mode sitting next to me for about 35 minutes now and the flickering seems to be getting a little better (less constant), but it's still there.
Is this something that will disappear after a little use or is the Orbtronic/Armytek combo doomed to never work? Also, the Orbtronics work fine in my Fenix PD31 and Nailbender lights.