In the bicycle market, battery powered lighting is more and more common. A disadvantage of battery powered lighting is that the battery has to be replaced frequently. This can be avoided by using PV solar energy. The battery will then recharge itself and battery replacement is only necessary when the battery is worn out, after 3 to 4 years. The bicycle light designed in this project
makes use of a separable battery pack. The battery pack houses the PV panel and the battery, which means that it can charge separate from the bicycle on a location with higher irradiance than where the bicycle is parked. An additional advantage of the battery pack is that it can be used for other applications. Conversations with bicycle light manufacturers indicated that they are interested in designing bicycle lights that make use of the battery pack.