Let Weather Ready? be the light in your preparedness plan for emergencies. You'll be ready to light an entire room with these bright white Nichia LED compact flashlights if the power goes out. Comes on when the power goes down. Battery Type: Rechargeable NiMH; Flashlights Type: LED; Power Source(s): 1 NiMH Rechargeable (Included); Bulb Type: LED.