Battery life is very good. On par with an 18650, which is all that's in them. I get a full day out of it with about 25% left. That's alternating between a 1 ohm tootle puffer and a .08 dual coil nickel build throughout the day.
Very Cool.
I just received one Today. It seemed like the Battery the Battery meter went to 1/2 Very Quickly. But I was Chain/B2B vaping trying different Settings and Swapping out Builds.