2. Battery-powered; the name suggests, this is use the batteries to power lights lighting. Because these lights do not need to sacrifice in the form of kinetic energy to provide electricity, and the total weight is very light, widely used in the off-road riding and long rides without bright night lights.
Battery and light separation based on the type of bicycle handlebars do not have lights on the battery, but also Find a local placement of the battery, the battery capacity can be set relatively larger, mileage is also longer. Some of the lighting system did a very professional, there are two lamps, a close lighting, illumination distance of 3-6 meters in front of the bike, through the translucent glass front made some optical processing, making the lighting is not usually a circular area shaped area, but perpendicular to the body of the strip, 4 meters wide and two meters can illuminate an area 5 meters in length, far away from the irradiation of light of about 6-20 meters, even 50KM / H per hour riding in the normal asphalt without any problems. The brightness is too high, in order not to affect the road to the other person, specifically set up a control handle, which generally used to control the high beam switch, of course, features include on, off, low beam, the brightness intensity adjustment, etc., which are good for night riding.
However, these bike lights are often placed in the bike, it is a bit cumbersome in the day and not security. besides, there is a big drawback, if two sets of white LED light bulbs are used, and it is more expensive that may cost about ￥300 with two 18650 lithium.