Batteries charge only when the ambient temperature is neither too cold nor too warm

With their ergonomically shaped footbed

Various inner pocket solutions

It is made of water-resistant

black diamond storm 450 headlamp Alpine Skiing|Men's alpine skiing wear Batteries charge only when theBlack Diamond 450 Headlamp. For the technical consumer who wants the best, brightest, most waterproof, feature rich headlamp to use for fast paced, extreme environment activities. This user also has the need to run the lamp on alkaline batteries if caught away from a power source for a long expedition. FEATURES Dual Fuel: Power with three AAA Alkaline cells (included) or the rechargeable BD 1500 Li ion battery and charger (purchased separately) for