General description Portable and detachable charging box designed for DIY enthusiasts, capable of housing 5 flat head 18650 batteries. This external battery case features a digital display for power supply monitoring and comes equipped with anti-reverse connection protection. It can function as a power bank when the built-in battery is used, with options for quick charging without a cable. Technical specifications Model: CX5 Series with Light Battery type: 5 x 18650 flat head batteries (free welding) Maximum output/input power: 5V-2.1A Dimensions: Thickness 23mm, Width 80mm, Length 135mm Inner dimensions (without spring): Thickness 18mm, Width 72mm, Length 92mm Color: Black Material: ABS Compatibility and accessories Compatible with Micro, USB, and Type-C charging interfaces Includes a lanyard for easy portability Usage Ideal for users with larger charging needs Power display indicates remaining battery life for efficient charging Other information Package Contents: 2x 18650 Power