This light is more than rechargeable, it's two lights in one! Use it as a Nicad rechargeable or simply convert it to a standard alkaline system by changing the batteries. The Shockwave Rechargeable comes with everything you need to convert the light, all in a custom carrying case. (Also available without the carrying case and alkaline batteries) Includes: industrial nicad battery pack, charger, lanyard, 8 C cell alkaline batteries & custom carrying case.