these batteries are finicky!!! my original order-one of the batteries died in 3 days along with the atomizer. just got 2 spares i ordered. one had some trouble lighting after an hours use, cleaned the threads, then it was acting a little sticky and stayed on a couple times. hoping it will just "break" in a bit. the other, i thought was doa, didnt light at all...then i drew real hard and it worked, along with a mouthful of liquid 8-o anyway, i found a solve for this....figured i'd share.... hold your thumb over the hole in the atomizer, which will give a "super vacuum" to the battery, and it will light with very little "draw". hold this a few seconds to heat up, then release the hole while continuing to draw.got great hits off it that way without straining. hoping this battery will loosen up a bit, and will prolly just keep it in the background for now as backup since it does require a little "trick" to make it work, but it does work prefectly for me when doing that...hope this helps even a few people.