I think there are two things GH should explain to us. First what battery protection circuitry is in place, short circuit, reverse battery, charging, etc. And second who makes these batteries and what are their specs. If they are getting it from some Chinese company then that Chinese comapany are probably buying C and D batteries from the big battery companies like Samsung, Panasonic, etc. The fact is when you are dealing with Lithium and high amps you need quality batteries that you can gaurantee are within spec. The battery venting in the GH should scare everybody. Should just not happen. There should be circuit protection for that.
I still think there is a battery contact issue going on that is possibly creating arcing and the rear end heating up. It is going from being a troublesome issue with all these issues to being very worried. That could easily have started a fire.
I have three batteries, upon receiving the unit, I labeled them 1-3 (they were charged upon arrival) -- One battery, battery #2 charged and operated as expected delivering at least 15 good heady draws at temp setting 3 before showing the flashing red light to recharge. Battery #1, would never take a charge - once the magnetic charger was connected it would show a quick blue light then nothing. I let this sit on the charger for 35min -- batt was dead. Battery #3, initially charged as expected for the the first several minutes then showed neither a flashing or a solid red or blue light. I smelled something, noticed the GH was hot and opened the back end, the batt had swollen in the chamber, a few taps and I was able to remove the melted batt. The batt chamber had a residue and smell, I wiped out the chamber placed in battery#2 and received the dread clicking and flashing red and then it bricked.
Its a phenomenal item and quality in its hand-feel and form, but this thing is definitely in the beta phase and might as well be considered a custom-shop item.
They may send me another unit, I have yet to hear back from Trevor or Caroline, but I have to seriously consider the prospect of vaping good organic product through a device that may at any point exhaust toxic chemical fumes.