I don't think you can use the KL4 on the E1e. It will fit but I think the KL4 is made for 6 volts and 3 volts would make it drop below the regulation quickly and end up pretty dim I would imagine. The KL1 would work though.
Or you can just trade it in for the E2e which is 4 times brighter for the length of one battery. /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif
Or the L4 which is like a white flood of light that makes everyone say "$#&%#$ that's bright"
And get a Clickie tailcap
And you gotta get the 120lm P61 on a D2/6P/M2/C2 for 8 times the light of your E1e
And.......
/ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif
Welcome to the SF club, you will now be broke in a matter of months /ubbthreads/images/graemlins/smile.gif