Omg, unbeknownst to me, my husband, in his worry that I might go back to smoking, ordered 3, count em, extra starter kits from vaporfi. All sub ohm, all non adjustable. And so long ago, that I can't return them. So for the next year at least, I guess I'm using vaporfi vice and edge machines. I talked to vaporfi, the only useful, if too late advice she had, was not to overcharge the battery as that could be casing a hot connection. Says they are sensitive to charging habits. .?? The thing itself doesn't show when it's fully charged, So I'll have to go by the clock and suggested times. I've probably damaged the 2 I'm using, I've not been worried about charging time, thought it would auto stop once fully charged. He's easily spent over 500$ au, and I can't really justify buying another until these are worn out. Hopefully, the bit of knowledge I've absorbed, and finding juice I like will keep me going. Good news is I REALLY don't want to smoke. Don't know how to post photos, but when he showed me my backup drawer of vaporfi stuff, I could have fallen over. He's an angel making sure I don't run out, but like me, doesn't have a clue about equipment. Oh dear. Send up a prayer that I don't blow myself up in my ignorance. So I'll just keep going and no point worrying. I've got what I've got. Simple to use, yes, to understand, not so much.