• Product Specs: Rechargeable Core Battery compatible with Petzl headlamps, providing extended runtime and reliable power for outdoor activities. • Technical Information: Features a USB rechargeable lithium-ion battery with 3.6V and 2600mAh capacity, ensuring long-lasting performance and quick charging. • Material Details: Constructed with durable, lightweight materials designed to withstand rugged outdoor conditions and frequent use. • Care Instructions: Charge using a USB cable; avoid exposure to extreme temperatures; store in a cool, dry place when not in use to maintain battery health.