ThinkVape Finder 167 not working?

[jays92]

Hey guys, I have a Finder 167 that was just working and all of a sudden after unplugging it from my PC is no longer working. When I press the fire button, "DNA 250" shows up for a split second then the device turns off. When I hold the button, it goes through the normal start up screen but then just flashes "Check Battery". When I have it plugged into my PC the device stays turned on, but when fired it says the same thing. I googled it and brought me to these forums where someone had the same issue, they went to the mod tab in escribe and it had changed to a 3 cell device instead of 2. I went and checked and mine is still set to 2. Could anyone shed some light on what else to look at? I just bought this device less than 2 months ago, makes no sense.