Some time ago I was gifted a Sidewinder carried by a Marine. I really like this light and used it daily for several years. I neglected to check the AA batteries regularly and I discovered they had leaked . The Sidewinder still worked fine but had corrosion on the battery posts. I cleaned with a touch of baking soda and vinegar. Once cleaned, the light would no longer work. I called Streamlight CS and got permission to send it for repair. One week later I received a brand new Sidewinder free of charge. Now that's CUSTOMER SERVICE!!'