Brian's right. I've had LR attys that only lasted a few hours and a couple that only lasted a day or two. But for the most part they last from 2 to 3 weeks for me. I'd love for them to last a month like the regular attys. Several times I've thought I'd just go back to the regular ones, but when I try one, I don't get the hit I'm used to with the LRs, so I go back to LRs. I bought 25 attys from Puresmoker like Brian mentioned, so I don't feel so bad if one or two don't last as long. I figure I would have spent $5. on a pack of smokes anyway, so if I get more than one day out of them, it's all good. And really, I've only had a few very that didn't last at least two weeks.