Hi Satman
I use a couple of Mods at 3.7v and 2- at 6volt, I also use
VP1 and VP2 from vaprlife.com . I still have 510 but never use it any longer.
It hit well but batteries cost way to much to last a couple of weeks to a month.
You might also try
THAG BUILT: You think you can break it? the chuck or little chuck series.
there are so many PVs that would , I'm sure also be good that the suppliers have on here.
I just stay away from proprietary battys that are specially made. I go with devices using
14500,10440,cr2, RCR123a battys that I can get cheap. There are others too like the 18500 battys that last forever.
Prodigy I hear is also good. super t,
Silver bullet Id really like to have. This from looking at it may be the best choice for someone to buy at this time. Looks well built with safety features built in.. Check this one out. Dont have the link to it but you can do a search. Im sure easy to find..
Hope this helps out some