I've been using the Dual Coil Stardust V3 V3+ cartomizer.. I have 2 types of batteries both are ego-c but one type goes from white light to blue light depending on battery strength the other type just lights blue.. I can use the carto on the blue one but as soon as I use it on the white it no longer works on the blue... What is causing this? It's happened with 2 of them now.
