I've read a few reviews of the Evolv Kick 2 but none have mentioned the battery life - which is phenominal. The Kick 2 will stop firing when your battery reaches 2.7 volts .. a big improvement over the original Kick that gives you a ridiculous amount of vape-time. I am running it with an AW 18350 700mah battery, set at 10watts with a 2.5ohm device and getting 12+ hours of vape-time. I use it with my Protank and can vape more than 2 tanks full of liquid on a single battery. I popped this battery in at 10am this morning and it's now 1am and it's still going strong - and I've been vaping heavily all day! My ego 650 usually lasts me around 6 hours so I'm pretty impressed with the vape-time I'm getting from this set-up!