I apologize in advance if this has been covered before but I couldn't seem to find the answer by searching. I just purchased two 18350 Trustfire protected batteries. Fully charged them fresh out of the packaging and rubbed my hands together in anticipation as I let them sit for about 30 mins before I loaded them in my Ego APV and fired 'em up. Im using them one at a time so that I can use my APV in its shorter setup. They read 4.2v... which is great and they vape great until I hit 3.6 volts. Then the mod just shuts off. I have to remove the battery and put it back in to start it up again. I tried on wattage mode and same thing above 4.5w. I have tried several cartos and clearos at different ohms. I dont have this problem with an 18650 battery. I know the mod has a protection circuit, does this mean it will cause me issues to use protected batteries?