I have the an authentic limitless mod and started having problems with it "hanging" up day one. I have recently upgraded to the magnets from the spring as well. It turns out the button retainer catches on the black delrin battery "rattle" adjuster due to insanely small tollerances. I solved my problem by holding it( to not wreck threads) and using a step bit to drill the hole larger. It still has lots of meat to support the battery properly. Hopefully this will help someone else out that is experiencing the same issues.