I know about the AA limitation, but I'm not asking for a 2AA light, it can be similar to the PT Surge which runs two set of 4AA in parallel.
Unfortunately, PT Surge doesn't do low brightness which put it out of the competition. I'm looking for a light that can be bright when needed, or stay on low and the battery last forever. It also has to use AA as my other travel items (shaver, GPS, etc) all uses AA.