If you want to step all the way back (in size, no quality), consider the latest iteration of the Kr8, e.g., the $60
Bloog Maxx Fusion, $55
Halo G6, or $45
Smokeless Image VOLT. [All prices are for their two-battery/five (or seven)-cartomizer kits without PCC.] Choose the 65mm battery size for a 103mm super-mini analog-sized e-cig or the 78mm batt for a 116mm mini-sized e-cig. Most of the
batteries are
automatic (and perform flawlessly, but remember they are not sealed).
For something more cigarillo-sized, I've recently discovered the $50
Elite 808 from CigEasy. [
Very recently: It arrived in yesterday's mail.] I am quite impressed and am especially wowed by the vapor this thing puts out. It's a Kr8-compatible 350 mAh (more than the above Kr8s, but less than your Inferno)
manual battery (sealed, of course) and 2ml-capacity cartomizer.