Maybe it was me - I got those batteries and the SVD from FastTech.
Took a week, and arrived in perfect shape.
My ProTank, which I got elsewhere, came with a DOA coil in it - so when I fired up my brand-new-just-in-from-china mod....nothing happened. I was concerned. But I held down both buttons, got a "NON" reading off the coil, changed the coil, and have been happily vaping away ever since.
So far, the only trouble I've had with the SVD is because I've knocked it over several times, as it sits on my desk.
There's NOT A MARK ON IT, but I have a little dent in my laptop, and I worry, because my desk is made of glass. LOL.
I'm getting a cool stand made for my desk, just to hold my SVD.
I haven't timed it exactly, but when I pop in one of those batteries, I don't even glance at whether the fire button's glowing orange (low) or red (lower) until the next day.