It's not so much that I'm stuck on the 18650 battery size, I just need a good pretty high amp limit and know I can easily get that with these Sony VTC5s (and VCT4s). There are some higher amp 18500s out there (about 13.5 amp I think I've seen) that I could stay underneath typically, but every now and then I do build some coils down to 0.3 - 0.4 ohm range and wouldn't feel comfortable pushing the stated amp limits. If I did wind up with a Lab and extension I would have the flexibility to try it out in both form factors as appropriate. I have now gotten accustomed to topping everything with drippers except when travelling long distances, so that helps keep down the overall height too.
To be honest, I love the look of the Poldiacs but it does have a kind of "regal" look to it that might make me think to NOT take it out of the house. I could use it at home, and the Lab while at work and taxing the wife around town shopping and what-not.![]()
The Efest purple 18500 are 15A. They are well worth the investment.
You'd have to have a coil below .3 and a fully charged battery (4.2v) with a mod that has no voltage drop, and you'd still be below the amperage cap on the 18500 purples.