Ok and I warn you it is strange... I have an atomizer that seems to only work on one battery. I can use other atomizers with that battery and on other batteries but when i use that one atomizer it will only work on that one battery. What is up with that? I thought it was the USB passthrough being temermental but now I am wondering since I have discovered this. All the batteries are charged and the atomizers were just cleaned (maintance) This is occuring with myself and my husband both testing. We are new to this e-cig stuff so I decided to ask those more experienced and hopefully get an answer as to what is going on.