Hey guys, want to ask some question. Im using vapmod cobra t150 with 2 battery 18650 inside, zephyrus tank (dual coil), kanthal 26 with the setup sub-ohm 0.3-0-4. Suddenly while vaping, my vape feels a very high throat.. already rebuild like three times with the same setting as before but the same problem is still occur. Then i realize, after i release the puff button, it can be hear my tank still produce vape for about 1 seconds (can hear the sound 'ssssssss'). Fyi, im only charging using the usb charging port on the mod. I heard also its not good to practice this kind of charging method. My question is :

1. What is the effect on the mod if im using the usb charging method?
2. I feel that the problem came from the mod as i change to another mod, the problem did not occur. Is my mod damage or just the battery damage? (I didnt have any spare battery to test on the mod)

Really apprieciate the answer from all the sifus here.

Thanx