I'm doing research on my first VV/VW device and I have a battery question. I currently have an Ego-C and the battery lasts pretty much all day. I was watching a vid on a provari mini on the provari site and they mention the battery lasting from a few hours to all day. How is it possible for a bigger battery to only last as long as what I currently own? I use a Kanger T3 and Vision Nano clearomisers and the battery seems to drain faster using the Kanger. Do ohms play into battery life? I can't justify spending Provari (or close to Provari money) and only get 3 hrs of vape time. I need a device that will last AT LEAST as long as my Ego-C. I'm not opposed to buying, charging and keeping extra batteries with me. Is that what I should figure with most VV/VW devices? Thanks in advance.