Keep your flashlight charged and ready. Compatible with the Coast PS700 flashlight, the ZX650 ZITHION-X rechargeable lithium ion battery features a built-in Micro USB port for easy charging outside the light. This workhorse runs up to 40 hours on a single charge. 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. All Coast ZITHION-X batteries are protected with premium overcharge/discharge protection and are backed by Coast's one-year warranty.