I have 2 of they product . both fail miserably . never get a whole lot of use out the minus because the bulb life and battery life be just terrible . I recently try to upgrade it with a lead kit . forget it . the internal plastic part just fall apart in my hand . I have buy one of they c cell light about 10 year ago . it make it through one set of battery . when I try to replace the battery , the tail end would not come off . it have somehow become weld to the body of the flashlight . I think the part corrode together and get stick . try a vice , channel lock pliers , you name it . anything that would impart enough force to get it unglued would have damage the body . go in the trash .