This is a battery holder compatible with the HL8 and HL8R headlamps. The battery holder is located at the back of the headlamp and can hold 4 x AA alkaline batteries, allowing for a runtime of up to 64 hours. The HL8 and HL8R are ideal headlamps for professional users who need high-performance, hands-free lighting. Whether you need a rechargeable lamp or one that uses alkaline batteries, both headlamps are an option. Since the HL8R operates with COAST's Dual Power technology, it can be powered either by a COAST ZITHION-X rechargeable battery or standard alkaline batteries. You can easily switch to alkaline batteries. The battery holder is protected by COAST's one-year warranty against material and workmanship defects. Package contents: 1 x battery holder. COAST strives to manufacture LED lights that not only provide high light output but also better light quality. Therefore, we emphasize light quality and focusing technologies just as much as light output and lumens. Their wide selection of lights allows you to choose the right lamp for each task or application without having to compromise. So if you value solid quality, we definitely recommend choosing COAST. COAST - Trusted tough.