I hate to bother people in forums but after weeks of searching and no results, I'm at a loss. I have a smok X-Priv, have had it for about 3 months now. Works fine when batteries are 100% charged. Once the batteries fall down to about 65% charged, it will fire for about two seconds then the voltage will drop from about 4.25 volts to 0.05 volts. I have 4 sets of batteries and it does it with all sets. I ordered two new sets of 18650 3.7v 3000mah thinking that maybe all my batteries just happened to go bad at the same time. It is still doing it with these new batteries. Has anyone ever ran into this? Any ideas on what I can do to fix? Any info, help, or ideas would be greatly appreciated.