Just received my 3.5ml tank today. Filled it and put on the brand new, freshly charged King Diamond that came in the same order. Nothing, absolute nothing. Took everything apart and started all over. Nothing, absolute nothing. Put on another older King Diamond and got tons of vapor. Put on the new batt again and nothing. Ran through four other older king diamonds and got tons of vapor. So I guess the problem rests with the batt. Center post all the way up, etc, etc. So have I got a bad batt or is there a fix? The batt does work on cool carts, but not the tank.