i am working on a high voltage flashlight mod, and have been getting a bit crazy over the bats blowing up...i have space for 2 cr123's - from what ive read here and on the flashlight forums the LiFePO4 are the safest way to go. 2 or them for 6v...anyone here know of any conditions these could hurt someone? plan on using 2 of them in series...anything i should do to make them safer? safty first hahaha then big vapor