No idea about any other flashlight, but...
I called Pelican Customer Service, and they didn't seem to know much about it and gave me something like this:
Use of any battery other than Energizer Eveready #E91 Alkalines AA with void the certifications for Haz Env use.
The e2 L91 Lithium AA Guarantee:
"We will repair or replace, at our option, any device damaged by these Energizer(R) e2 (TM) lithium batteries, if the device and batteries are sent to: Eveready Battery Company, Inc., Box 6056, Cleveland, OH 44101. Guarantee void if batteries are charged by user or device."
The good news is that I've got a few sets of the Energizer Lithium e2 L91 AAs from the US at considerable saving to getting them here in the UK, so I'll run Alkalines in one StealthLite and Lithiums in the other for side-by-side runtime/output tests. I'm also gonna take them in a seperate test into the bulk freezer at work and run them at -25C for at bit to see if there's any difference.
<FONT COLOR="#000000" SIZE="1" FACE="Verdana, Arial">This message has been edited by Size15s on 02-01-2001 at 01:52 AM</font>