I purchased two of 'em couple of months ago and was very pleased with them. Looking to get several for Christmas presents. Mine ran 3-4 hours before I could see a reduction in output, then gradually diminished for 6 more hours. This was on a duracell, not an E2. I did a short review on it here. You can probably find it by searching my posts or Lifegear 1aa.
I had Target near me to try ordering some more. They said the item number was still in their system, so we'll see.
I have the 2C version also. Just wish it were a side clicky. I have Streamlights, Mags, Surefire, Fenix and others. I just think this is a lot of flashlight for the money for an AA light. I put one of the rubber heads on one of mine that is sold for aa maglight. Just put about 2-3 turns of electrical tape on the head of the flashlight first. Can't see it once the rubber head is on!