Recieved two Touchwoods yesterday, full size and mini. Been flipping back and forth between them since. I'm using 4xl mega dc 1.5 cartomizer on both and I'm really happy with everything about this setup. The only thing that worries me is the batteries(Aw IMR 18650 and 18350). If I've understood what I'v read on ecf these are not protected and I run the risk of running them too low and they will not take a charge if this happens. - Been using my ProVari to test the 18650 and by the draw on the Touchwood can pretty much guess the reading I'll get before I do this. But I have trouble with killing batteries so I don"t want to run them too low. I would love some advise and if you use a competely mechanical mood please chime in on anything about it you think I should know. Been cigfree since 12/31/11 and this site has been a big help. THANK YOU