This!!
There is a HUGE difference in the brand of batteries. Generic no-name batteries are crap and should be tossed in the garbage. Go with name brand IMR batteries, and stay away from anything with "fire" in the name.
Battery Basics for Mods: IMR or Protected ICR?
This was in the OP's 1st Post.
Please respond to this with any thoughts on what this might be.
I just bought the two 18650's from madvapes, they are panisonic 18650 2900 mah. and the two 18350's are Efest IMR 18350. I got all of them and put on charger before i started to use for vape. They all showed one bar on my charger
and then Later this...
I let it get a full 3 bars, then i take it off and vape for about 1 hour and I notice a huge difference in performance so i put it on the charger to see where its at. Its always below that first bar. Im dead broke at the moment so i guess ill have to invest in yet another thing for vaping. This is becoming very expensive.
So I am Assuming that the OP is having problems with His/Her New Panasonic and eFest Batteries Also.