I think the best imo are the Reo mini or Grand, the Ali'i, the Darwin, the Provari and the Eclipse. Never tried the others so I can't comment, their are other good ones too.
Big limitations with mechanical PV's.
"Big" is a bit of a stretch. With something like the Megalodon you can do 3.7v, 5v or 6v...higher if you're into that kind of voltage. What are the "big limitations" you're speaking of if not voltage?
Every mechanical PV I have read about is limited to either 3.7 volts (too little power) or 6 volts (too hot). 4.5 to 5 volts is the sweet spot for vaping for many. That's why 5 volt and variable volt PV's are so popular. I don't know how a true mechancial PV can do 5 volts. I believe it requires a resister at a minimum.
Every mechanical PV I have read about is limited to either 3.7 volts (too little power) or 6 volts (too hot). 4.5 to 5 volts is the sweet spot for vaping for many. That's why 5 volt and variable volt PV's are so popular. I don't know how a true mechancial PV can do 5 volts. I believe it requires a resister at a minimum.
That's why you need a GLV2
There are 5v batteries and specific chargers for them. They work quite well, though at 600mAh they aren't lasting as long as some would like between charges. Still...it's possible to use them in mods that take 18650's as the size is roughly the same.![]()
I have only read about one 5 volt battery (and I believe it was really 4.6 volts) and I believe it was a NiMh battery instead of a Li-on battery. That is a big limitation right there. They don't work as well and you are locked in to few suppliers of that type of battery.
Mine came off the charger at 5.2 volts. But agreed, I only know of 2 vendors in the US selling them. They weren't my favorite, but only because of the short battery life. They performed well, just not long.
Don't get me wrong, I have nothing against VV devices at all. When I had my ProVari, I loved it, I just didn't use the bells and whistles enough to justify keeping it. I still own a VV Tekk and once in a while I get my 4.5 or 4.8v vape on, but just from a personal stand point, I don't need a ProVari or a Darwin and there are many just like me happily vaping with mechanical and non mechanical mods all at a variety of voltages without VV devices. That fine tuning is nice once in a while, but just not a must have for every single vaper. That is all.
Variable voltage means more than just changing voltages.
It means regulated power.
The same vape throughout the battery cycle, instead of starting at 4.2v and tapering down to 3.3v.
Set it at your desired voltage and vape.