Rechargeable Industrial Headlamp. The rechargeable headlamp that takes durability and power to the next level on the job, the Princeton Tec Apex Li is rated IPX7 water resistant and provides both a powerful spot beam and a bright flood light. Operated with two large buttons that make switching between modes quick and intuitive, the light offers 550 lumens and runs for upwards of 13 hours. The rechargeable lithium ion battery pack comes clipped to the rubber hard hat strap, and can be moved to your belt or jacket with an extended power cable for optimized comfort and incredible cold weather headlamp performance. Includes Industrial Headlamp Kit: * Rubber hard hat strap * 3M Dual Lock * Standard nylon headstrap