Check Out Texas Instrument's 5v regulator!

[Sir_Lawrence]

I just put in a Texas Instruments 5v regulator UA7805CKTTR into a new mod I built, and I'm running it off of (2) rcr123a 3v batteries. It's giving me a perfect 5v and the amps through the connector, not the atty, is 1.45amps. It gives a great amount of vapor and taste. So, it must not need a lot of volts to run it, like most of them do. Just tried one of the regulators they sent me, and it worked!

 

[thomas0407]

They sent me the UCC383TDKTTT-5 5v high input 9v and drops out at 5.45v