Features: 2x21700 Power banks set with digital display offer easy assembly, enhanced charging efficiency, and real time battery monitoring for portable energy solution. Featuring over current/voltages/short circuit protections and ABS construction, this 2x21700 battery compatible case ensures secure power storage and optimized space utilization for extended device runtimes. Ideal for travelers, outdoor enthusiasts, and hobbyists seeking customizable, high capacity mobile charging systems without welding tools. Perfect for camping trips, backups, or daily commutes, its compact design and charging ports keep smartphones, tablets, and gadgets powered. The integrated smart protections circuit and ABS housing deliver performances, making it a power banks set for frequent outdoor and on the go usage. Specifications: Component: Plastic Charging power: 10W Output: 5V2A Input: 5V2A Port: Type C, USB Applicable battery: for 21700 battery (without battery) Size: about. 54x26x99.5mm/2.13x1.02x3.92in Color: White/Black Package Includes: 1pc Battery Case (Battery NOT Include) note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. Battery NOT Include.