CHARGE!!! When you head out to face your adventures, bring this Rechargeable Battery and never be low on light. The CE-certified CORE is a high-performance Lithium-Ion Battery that's the solution to power your Petzl Headlamp. It comes with a USB cord with which to acquire its charge. Use it in your Headlamp for your main source of power or as a backup batter! Compact and lightweight, this Battery remains incredibly resilient to travel and cold temperatures. This Battery is an eco-friendly and sustainable means to lighting the way and will last you up to 300 cycles of recharging. The charge indicator uses green to show a full charge and red to show low charge. The CORE Rechargeable Battery will work on your Tikkina, Tikka, Zipka, Actik, Actik Core, Tactikka, Tactikka+, or Tactikka+RGB Petzl Headlamp.