Charge up and keep working. Compatible with the COAST EAL55R Area Lantern, the ZX915 ZITHION-X(TM) rechargeable lithium ion battery features a built-in USB-C port for easy charging as well as a USB-C Charge out Port that can be used to charge externally devices such as a cell phone. A battery charge indicator flashes red during charge-up and shines solid green when fully charged, and the overcharge/discharge protection circuits make powering up as simple and safe as possible. The battery is backed by COAST's one-year warranty against defects in materials and workmanship.