you do not have to use the ones they sell but they do recommend the AW brand, personally I use these.Do I have to use the batteries they sell?
I buy my batteries from Provape because I trust I'm getting what I'm paying for. I'm sure you can get them cheaper from other vendors but the price seems reasonable to me.
The Provari requires the use of button top IMR batteries. Using flat top batteries with magnets attached to allow them to function in a Provari is an unsafe battery practice and voids the warranty with Provape.
I use the red AW IMR batteries that Provape recommends. I get all of my batteries at RTD Vapor.
I also use a Nitecore Intellicharger i4 that I purchased from RTD Vapor.