COAST ZX1010 ZITHION-X: Li-Ion ported rechargeable batteries are designed with an integrated USB-C port, allowing the convenience of your battery to be charged outside your light. EXTERNAL DEVICE CHARGING: Power any USB-enabled device. Select COAST work lights feature a special external charging system that allows other devices to recharge directly from the work light's battery. BUILT-IN USB-C PORT: With a built-in USB-C port, your battery can be charged using a USB-C cord. Some COAST models can be charged both inside or outside the light. All COAST ZITHION-X: Batteries are protected with premium overcharge/discharge protection and are backed by COAST’s one-year warranty.