THREAD NECROMANCER!
No really, sorry to do it, but I have something to add. I own a vapor-x xlt piece of crap as my only unit and the cartomizer is going crappy. Only enough money to either get plenty of liquid and a new tank and try and make it work. I got a mini vivi nova tank from myfreedomsmokes, the one that only uses 510 threads. The vaporx xlt battery is not 510 threaded BUT it is close, and I get it to thread and activate in a slightly crooked-looking but "durable" setup that reminds me of a wasp with the narrow waist haha.
This guy here:
CE5 Mini Vivi Nova Tank - 2.0ml (Sold Out) - MyFreedomSmokes.com
It fits well enough to be worth it, this battery does have very high voltage and 1100 mah or whatever. 4.7 volts with a meter and fresh charge. Need to replace with at least an ego-c or something because I hate this nonstandard crap but it does work very well in a way with this tank. If the threads fit, it would be a very nice battery.