Features: Elevates your charging experience with this 21700 Battery Holder for USB C devices rapid power delivery. Suitable for enthusiasts and on the go individuals, this power sources case caters to various charging need. Whether you're camping, traveling, or facing a power outage, this portable charger keeps your devices powered up in any situation. With its robusts PC+ABS constructions, this battery storage box promises durability and reliability, keep your power supply secure and ready whenever you need it. Tip:21700 batteries are not included in the package, you need to purchase separately. Please pay attention to the direction of the positive and negative poles. Specifications: Component:PC+ABS for 79x33.5x27mm/3.11x1.32x1.06inch Number of batteries: 1x21700 battery Option Color:Black,White,Pink,Green; Interfaces:USB C port; Package Includes: 1pc Case (Battery not include) note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.