Led Ultrafire

Can UltraFire C3, 1 or 2 AA LED flashlight use 18,650 Li-ion batteries???

Li-ions are a major force, who are only designed for use in devices that automatically shuts down to tensions in a critically low level of load and must be loaded on a smart charger (feedback controlled reverse bias charge) in simpler terms in a relatively simple piece of electronics like this a dead battery means exactly that a totally dead battery uncharged, also LEDs are also very sensitive to polarization and because the battery from its mention is 3V cell 2 of them would most like to be more than 2 volts forward bias (maximum forward voltage before it is taken and explodes or burns I had to explode before), also from the looks of them are a little thicker and then ny shorter cells and AA cells then it would not even Housing flashlights.

Led Ultrafire

Led Ultrafire