Advanced Lighting has a repair and service department with a 2-3 day turn around time. Please return your flashlight to 30 Raynor Avenue, Ronkonkoma NY 11779 with your name, phone number and return address in the box. When we recieve the light one of our representatives will call you with the cost to fix it. You may give us a credit card over the phone or send a check. Any questions or concerns call 631-467-4877.