I am a long time SurvivalBlog reader. I read the review on the Paklite and I wanted to post a link to my non-commercial blog which has some posts on the
subject (where I experimented with the battery life).
They are great little lights and we now own 3 of them. (Two are standard blue-white LED and one is red LED to retain night vision). I regularly encourage people to get them.
Thanks and keep up the good work! - EagerGridlessBeaver