Hi,
The LG HG2 maintain 3.5 amps and higher in my UF C12 and other flashlights, its not the cells seems like something has happened to this Flashlight only, this was much brighter than the c12 and now there difference between high and turbo are hardly noticeable, even my wife and son noticed something amiss with it. I have even tried different makes i.e. sanyo and the same results occur.
This is pretty weird - lost amps, tint shift on this thread OP's XP-L HI. If it was an XP-L, I might think the dome got damaged - happens all too often on XP-L's... But XP-L HI's seem pretty rock solid, but who knows. Maybe try to a close looksy at the LED covering layer.
Thanks guys, I just got nervous because I gifted my X6R before I got one for myself! It was a real nice piece, for me that side switch is a huge upgrade from the regular x6.