This rheostat cover is designed exclusively for the NL682 Nite Lite battery. The rheostat is a full 4-watt unit with an off position. The rheostat has a rubber neoprene cord relief and the spotlight may be mounted through the front of the rheostat beside the light cord. NL49R Fits the older model NLKK49 Kitten Kooner & NL4V99.