I can use my five volt with an 18650 batt and take it down to 3.7, I didn't use it at 5. The top end isn't recessed which is why I used it because I didn't have a super long tip on it.
I did play around with it, like that I can fill it a bit more than a 510 but lr is not vaping heaven for me so I need to be smart and know when to say when. The 306's do come in a high performance blank carto and I do like the way the tips are designed because the liquid will run down the sides and into the filler (I drip into my cartos constantly) so I am gonna give those a whirl because I am assuming that the 306 tips will fit on the 306 cartos.
I did play around with it, like that I can fill it a bit more than a 510 but lr is not vaping heaven for me so I need to be smart and know when to say when. The 306's do come in a high performance blank carto and I do like the way the tips are designed because the liquid will run down the sides and into the filler (I drip into my cartos constantly) so I am gonna give those a whirl because I am assuming that the 306 tips will fit on the 306 cartos.
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