This from Wayne at heaven gifts who is in constant contact with joye and kanger techs....
"I am also using twist battery+tabacc, it's working well and there is no problem like the thread says, I guess that customer is using a copy twist battery. Joye tech have two different eGo threadings, one 5 threads another 7, both can fit the Tabacc BCC. However, some Tabacc cartomziers center connector may not well contact the center connector of Joye series batteries, it's easy to resolve this problem, you just need to use a small screwdriver or a bamboo skewer to wiggle the center connector of Tabacc BCC out of its rubber seat a little bit, so that it would become higher, then it can well contact the battery connector. joyetech don't have other eGo threadings, so it's not true that joyetech has changed the eGo threading."
There's another thread on this issue and I'm guessing it's either a Twist copy or a center post problem with the T3's....
This isn't the problem we're experiencing though. The Kanger T3 will work, but it doesn't completely screw down because of the extra threading resulting in a bad seal.