I am having troubles with my MVP 2.0. I got it two months ago and it was wonderful. I would get three days out of it running around 300 puffs a day. I have dropped mg in my juice, so I obviously increased my puffs a day. I hit about 450 a day but my battery life is only a third. I hit yellow by 400 puffs. Did I ruin my battery life by draining it to red before charging?