I had a bit of time to mess around with the short batteries last night and I wanted to share a few notes of what I have observed. Unlike the normal VK batteries the shorties definitely need a full charging cycle before use. They will work right away, but they work much better after the charge. Leaford recommended to me an 8 hour initial charge. These batteries also seem to take a bit to "break in". I have a couple that we a little finicky after the first charging cycle, but after the second charging cycle they sprang to life. These little babies put out a ton of vapor once they are dialed in. Also they have a harder draw than the standard batteries, which I, for one, enjoy. The other interesting thing I noticed was that as you use the battery and it becomes discharged the cutoff seems to decrease. For example I had one that was almost dead last night and the cutoff was around 4 seconds rather than the 7. It's kinda nice because it gives you a little heads up that it needs to be charged.