Not sure if you've bought your g6 yet or decided against it but I can 100% vouch halo products. I started with 2 of their xl g6 batteries ( 420 mah and no 5 second cut off like the rest) and I quit smoking cigarettes with these. they worked like nothing I had ever used before. After 3 weeks i ordered another g6 battery in the standard automatic size( for driving) and it vapes just about as well but not quite as strong. The xl battery could literally last me all day and vape about 3ml or more easily. Fell in love with
vaping with halo that i ordered Their VV triton and a few different res. coils(a beast for 30$ pricetag). I don't have a volt reader but i would say that the xl g6 battery probably hits 4v when fully charged if not a little more. And as far as carto's go I've used about 5 or 6 different cartos and 2 clearos and and the halo mini
tanks are amazing. at the moment with tribeca i still can't find the "perfect spot" on my triton that tastes as perfect as on my g6. Anyways sorry for the rant but I just dig halo and their
juice. Good luck -Panoz