(1). LED flashlight bulbs could be used in wide-range voltage, e.g.: 1V-9V (2). It has long lifetime, the LED lifetime are longer than 50000 hours (3). It is so good vibration resistant for LED flashlight bulbs. (4). When consuming with same power, LED intensity is higher than incandescence bulbs (5). It saves energy, the continuously lighten time of LED flashlight bulbs are longer when using the same battery. (6). Using standard bulb base, to instead of the existing flashlight bulbs directly (7). It belongs to the Green products and Energy saving products (8). It is easy to replace after damaged.