The Apex Extreme is the epitome of extreme cold weather LED headlamp design. Unleashing a powerful 130 Lumens of output, this workhorse satisfies the needs of mountaineers, adventure racers, cyclists, cold-weather climbers, backpackers and campers. The advanced circuit system of the Apex Extreme allows you to choose from 4 brightness levels of light output. The compact, remote, 8 AA battery pack can be clipped to your waist or other gear to minimize the weight on your head. In cold weather, wearing the battery pack under clothing, close to your body, will increase alkaline battery efficiency and run times. The Apex Extreme is designed to work with alkaline, lithium, and rechargeable batteries. Power: 200 Lumens, Lamp: 1 Maxbright LED, 4 Ultrabright LEDs, Burn Time: 200 Hours, Batteries: 8 AA Alkaline, Weight: 416g.