Try using a more powerful wall-wart. Or if you are plugging the USB cable into your computer, you're only getting 500 milla-amps. The device sets the charging rate, but only up to the limit of what you're plugged into. Wall-warts go from 500 milla-amps up to a bit over 2000 milla-amps.
So does this only have to do with the charge time? This wouldn't effect how it vapes afterwards right? Like it don't give you poorer battery output if you charge from you computer all the time? I charge from my computer 90% of the time...
On another note, I know you aren't the operator for the VV V3, but.. do you happen to know when the battery is completely charged? Not in the sense that the light goes off, that is obvious. I mean numerical value, after hitting the + and - button. Mine has been at 4.2 for like 2 hours. Is 4.2 the max it will charge up too?
One more question, please don't kill me.
Thats all. Thanks