My first VV device was a Lambo. I was debating back and forth over which I should get when my brother pulled a Lambo out of a drawer and gave it to me. He said it didn't fire consistently. It turns out that the website where he got it had been out of IMR batteries for some time. My brother figured a protected battery should work just as well. It didn't! A protected battery is not high drain because of its protection. He said I could keep it because he had moved on to the eGo Twist. A very nice pair!