EdgeTac-Nitecore products are guaranteed against manufacturer's defect for 12 months.  Nitecore flashlights, if deemed defective, can be returned for evaluation and may qualify for an even exchange with same replacement product within the first seven days of purchase. Within twelve months of receipt, EdgeTac offers free repair service, except for any damage caused by abuse deemed beyond the product's operating parameters, or alteration and modification.  Any alteration of modification of any EdgeTac-Nitecore products immediately voids any manufacturer's warranty.  After twelve months, any repair and freight charges and will be the responsibility of the purchaser and may vary depending on service issue.  Any warranty service issues must first  Contact EdgeTac for the RMA#.