I bought a Firelight e-cig 2-1/2 weeks ago and have been using it sporadically (since I have another brand I like much better). It's been recharged a couple times, but today after recharging it for the recommended 3 hours, when I screwed in the atty, it became very hot, and the light at the "ash" end stayed lit. I took it apart. Is this the sign of a bad battery? If the batt only lasted 2 weeks with sporadic use, I think I'm gonna write it off.