why is it so many people criticize the KR808D1 battery life? i simply haven't witnessed nor experienced the short battery life they claim. some say the batteries are drained in 2 hours...i simply haven't even come close to that. what do they do, have the thing glued to their lips and puff for 2 hours straight with no break to breathe normally without it? sorry but it kinda gets my dander up...perhaps i'm just not chain vaping hard enough???