Originally Posted by JackJ
I get 100 minutes on mine w/ 2500 mAh Energizer cells; about 80 mins. with the OEM 2300 mAh cells after a few cycles. I routinely carry two sets of cells, since 4 AA's don't weigh much. I also run my light on "high" the entire time; the "low" setting is still usefully bright, but I don't know how much more time it gets you.
Jack
I agree, the low setting is bright enough to be
very useful. I tried both on a no-lights pitch black trail just after I purchased the light. Low is about 80% of high.
Like Jack stated, it is nothing to carry an extra set of AA cells.