I run this lamp in my SF M3T powered by AW17500 batteries. I get 25-26 minutes of continuous run time before the cells' protection circuit kicks in.
I highly recommend this LA. The beam is amazing - in shape, color, throw, and useable side spill. It outperforms stock SF LA's hands down.
I also run this in one of by M6's powered by the Phd-M6 3x17670 pack set at 7.5V. I get 56 minutes of continuous run time, and the beam is even brighter and whiter than the M3T.
Again, highly recommended.