Do you recognise this 
http://www.ebay.com/itm/Galuxia-Gladiator-Torch-Flashlight-Kit-Cree-XML-LED-1000-Lumen-26650-Maxtoch-/141043660214
I hadn't used this light (JM26) for a couple months or more. Checked the fairly new KK cell and it was down to .8 volts. I never tried to measure the parasitic drain on this light, but apparently it's pretty high. Maybe it was the resister mod.
is it just me or this light was available from Fasttech for like $ 47 shippedâŚ
yes but not under âGladiatorâ brand, it was genuine Shadow, and it was even lower price at WBâŚ
i can confirm: High parasitic drain 
Now I have left the tailcap unscrewed and see what happens to the battery
Unfortunately Razzi is now defunct so I need to reload all my photos and fix all existing reviews...
For now, here are the current measurements I took for a stock JM26, and yes, the standby while not the worst can certainly stand to be better:
A King Kong should last ~10mos (not including its own self-discharge rate) whereas an AW IMR would only last ~3.5mos (again not taking the cell's self-discharge into consideration).
Best to lock this light out when not in use.
@GioLight, the same thing happened to me with a KK and now it can no longer hold a charge. I've written off the cell for safety considerations and I'd be a little cautious about reusing your cell, it's likely damaged at this point.