hi, my fist vape I bought the MVP 3.0 with a subtank mini and I love it still. Well work started back up and I would bring my MVP but was getting frustrated at the weight of it in my pocket. It's so damn heavy. So I bought a istick 30w with the subtank nano and I find that the battery is dying way to fast. I chain vape and basically vape any time I can. I am looking for something with a long battery life that isn't too heavy and easy to carry. I was looking at the ego one but was unsure if it would be worth it. Please help. By the way I work about 8-9 hours a day.