I'm currently using a vct4 battery life is fine it's what you can expect from a box mod.
It has a vape counter built in ( every fire button press) it had full charge yesterday morning and if my memory's correct It was at 130ish I was using a 1.8 aspire nautilus so that was at 7-8 watts the vape count was up at 450ish this morning and battery life was at 58%.
But in all fairness my battery got a little hot last week from a build on a mates pipe so not sure if my battery's at its full potential. Next week will know a bit better as I got a new vct4 battery coming.
Hope this helps
Andi
It's all shits and giggles till somebody giggles and shits