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Petzl CORE Rechargeable Battery
The unique, customizable CORE rechargeable battery has a lifetime equal to that of 900 AAA batteries for a significantly reduced impact on the environment. Lightweight Lithium Ion Polymer technology provides you with a regulated source without fading light. The free, easy-to-use OS by Petzl software allows you to customize your headlamp to your needs by freely adjusting light intensity and battery life so that you get the right amount of light for the perfect amount of time. A universal USB charging system lets you charge your headlamp on the go using a wall plug, solar panel, computer, or any other powered USB port. The CORE battery is guaranteed to last 3 years or 300 charge cycles. A convenient LED indicator displays remaining battery power. The CORE battery pack snaps easily into place in just seconds and can be replaced with three AAA alkaline batteries in a pinch.