Opps! I guess I spoke to quick. I When I received my ProVape1 I was so happy, I thought I would tell everyone about how good this thing is. Well I should have waited at least a day before writing anything. I guess you learn as you go, but the ProVape1 is not what I first thought it would be. I have the AW 14500 750mah batteries, and the longest they will last is 3 to 4 hours. My Riva 1100 will last longer than 2 batteries in the PV1. I thought something was wrong with the PV1,( and it still might be) but David at ProVape said there's no way anything is wrong with the PV1. He said it might be the batteries, and if I will send them to him he will check them. By the time I pay shipping to send them to him, I loose money. I had some 14500 batteries from another mod I got from Madvapes, and they didn't last any longer than the batteries I received from ProVape. I bought the little mod from madVapes, and it's ok but I have read were the ProVape1 is so great, I just had to have one. When the batteries are fresh, You will not beat the production from this thing, but you better have a pocket full of batteries if your going to be gone all day. If I had known you have to change batteries every 3 or 4 hours, I would have saved that money. I could have bought alot of 1100 batteries for what I paid for this thing.