This flashlight can be powered by either AA, C or D cell batteries making it ideal in power cut emergencies such as thunderstorms or earthquakes when you suddenly find that the batteries for your conventional flashlight are not working and you don’t have any replacements at hand. With this model, you just use whatever is around. Furthermore the BF-104 has compartments for all three battery sizes allowing you to stock up in advance and to switch over easily from one type to another should the flashlight start to dim - battery failure is no longer a problem. The soft grey protective material around the reflector head of the flashlight acts as a shock absorber should the flashlight be accidentally dropped.