Just used my new MD2 body with two old (3 years) Nitecore RCR123's 650's running a Wildcat HICRI. Wonderful config - lasted about 40 min. on high. Easy to carry this config AND extra Batts. Head stayed cool in 34d ambient and woods was lit like a stadium. My dog and I were very lonely on the well lit trail...
Update: I discovered the best woods walking configuration for the Wildcat:
Using the MD3 body with three CRC123's (@11.1v), I find that because of the higher voltage, LO is more than bright enough to light the trail and even give some decent perimeter spill.
I set the head rotation so that it nearly engages HI and that allows an easy thumb press on the head barrel for a momentary "Yankee Stadium" moment in the woods if something goes thump beyond 200'. As HI is a momentary press of the thumb and then goes back to LO upon release of the thumb, I always have full lumens OTF almost to the runtime end. I've hiked 4 hours this way and the 3 year old Nitecores still had something left in them.
Having the ability to instantly pulse HI from LO and back to LO again is a great feature in a flooder light as I don't need all the lumens, all the time in the woods. Walking on LO allows my eyes to adjust to ambient conditions and becomes more than adequate for most of the trail. A sudden press on the head barrel gives me a solar flare of beautiful HI CRI light that renders objects out to 200+ ft in a 130d field of view that matches that of my eyes. All this without any 'blowback" glare off nearby tree trunks. Also no need to wave the light around - it's all right in front...
My own comfort zone in the woods is 200', if anything is just out beyond that and not moving away from us, I'll just have to deal with it a few seconds sooner - using a boater's pocket air horn, which scares the shite out of everything. 200' is also about the maximum you can fire a beam ahead in the average density of the Connecticut winter woods and still get useful data. Critter Eyes, though can still be made out much further back, floating and bobbing in the blackness. When we get closer, they are gone...
The Malkoff Wildcat HI CRI with an MD3 body and three RCR 123's has to be one of, if not the best, design and configuration for most real world uses.