Trouble with Itaste MVP battery

[Daniel1991]

Hi there, i just baught an ITaste MVP battery, the remodeled edition just released so it would fit with my vivi nova tank. The battery is great, looks, feels , works perfect....however. It comes with two spare small tanks to use, so i tried it first with those and it was good, then i tried my vivi nova SVD tank ,,,and it didnt work? so i tried my vivi nova(regular) tank and it worked great, i have used it all day. Once home from work i decided to swap back to the small tanks that came with the battery as to use up some of the juice i put in them. A wee while ago i switched back again to my vivi nova (regular) and im getting zero response? Anyone know why this is? its still working perfect with the supplied tanks, so nothing is broke , why would this happen?