Actually, it does. I bought 2 AW IMR 18650 batts with my ProVari order and it's happening with both batts. The batt voltage gets to 3.5-3.6 and the ProVari won't vape. It's happened several times now. It doesn't happen all the time but enough to make me wonder what's going on. I remove and re-insert the batt and then it vapes again.
When it happens I check Cb and it won't read the volts. The display shuts off with Cb still showing. When I remove and re-insert the batt the ProVari will vape again. I then check the Cb and the volts read 3.5 or 3.6. I haven't changed vaping voltage or my carto. Sometimes it just goes dead til I remove and re-insert the batt and sometimes it will go all the way to the 3.4 volt cutoff and the button flashes red.
Other than that, the ProVari is working aok.
We originally thought this was due to the protected batts but what's happening is at the higher voltages when the battery gets down to the end of the charge cycle, 3.55-3.4 volts and below, its making a very steep decline to the end of battery life. A lot of power is being drawn from the battery to pump the voltage up and more so when the battery is low.
This is where the device will shutoff and its time to change batteries. The voltage drop is happening very fast and you are seeing it turn off when the voltage tumbles down to the cutoff point. When the device has shut off due to being out of power you can still get into the menu and change some settings but the CB and AO modes won't display anything because they both need power from the battery to operate. These two modes won't work when the device has turned off.
At the lower voltage settings there is a much slower decline to the end of the battery life, so you have a little more time from when the led flashes to when it cuts off.
When you remove the battery and reinsert it you are able to get a little more power out of it because batteries will recover some. At this stage in the battery cycle you might only get a few more puffs until it turns off again.