North Bay Fire Department Fire Chief Butch Parker says it appears the cigarette's battery exploded while the man was smoking Monday night. The chief likened it to a bottle rocket going off in the man's mouth. He also lost part of his tongue.
Parker says the man had been using electric cigarettes to help him quit smoking.
Authorities don't know what model cigarette it was.
The victim is being treated at a Mobile, Ala., burn unit.