It worked just fine for the whole day yesterday. Tonight I changed the battery(AW 18650 2400 mAh) and all of the sudden it started misfiring. So, I reseated the battery thinking maybe it just didn't get a good connection. It continued to misfire 2 out of 3 presses. When I bought it yesterday it was the last one in the color I wanted(the black with raised...speckles. lol) and the one they had on display. It seems to have stopped misfiring for the moment but I wondered what someone else would do if this happened to them & their brand new mod. Should I take it to their second store in town? All they have left is the ugly pink and orange @ the store I went to. Idk. Are the SB's known for issues like this? Any info would be appreciated. Other than this small issue I'm loving my SB. Even @ 3.7V. Thanks for reading!