Is it normal with my lavatube v2 running at 4v average with my aga t2 at 1.4ohms to have a 2000mah battery last until about 3.7 or 3.6 v before the lavatube starts acting weird and not performing well, even shutting off? thought it was my setup forever but seems that a fresh battery always fixes the issue... But im going through 2 batterys a day just about... When with a vivi nova id get all day and im a pretty moderate to heavy vapor