I have have two of these and they have be nothing but a huge disappointment . within several month with both light , the internal contact begin to get corroded and I have to take the light apart to clean then in order for it to work . I have to repeatedly do this every few week . I also have brand new battery on several occasion leak within a very short period of time in both light . the light be always keep in the house and be never expose to adverse weather condition . I be guess it be some type of reaction with the type of metal use in the light since battery from the same package work fine and never leak in other device . these light appear sturdy and well construct , but they lack of reliability be very frustrating and both of mine eventually go in the trash and I would never buy another one . when you need a flashlight in a emergency and it tend usually not to work , it be very frustrating .