I had my first issue the other day, when my 3D would not reliably light up the drop-in with one click of the switch. Click a couple times, or work the tailcap back & forth and it would light up fine but then dim afterwards. Thinking I had contact or switch issues, I disassembled the mag and cleaned everything with DeOxIt. Still no difference. Then, feeling like a dummy, I dug out my Fluke, measured the batts, and found out why. With no load each Duracell had 1.49 volts, but dropped quick and current through the tailcap was 1500 mA with the light on. I put in new Duracells, current dropped to 800mA, and the twitchy on/off issues went away. This being my first Malkoff I don't know if this is normal but now that I know what to look for it doesn't bug me much.
Is this how y'all's Malkoffs behave when the batts go down?
BTW, two of the tired cells went into my Husky 2D to replace the cheesy cells it came with. They work in that light just fine (for now).