After torture-testing this for days and days on end I gotta say ... This Is It! This compact device is now The One. I was looking for an APV that took ONE 18650 battery. Found it. When I lowered the nic, boosted the VG, I could cloud all day. But I like my nic, got out of TC mode, and went to flavor town. I have read some folks had leakage with the TopTanks. Didn't happen to me. Was I lucky? Or did Kanger solve the problem? I dunno. But ... until I hear about something absolutely compelling ... this is where I'm setting up camp.