Features: Build your own high capacity 18650 powerbanks effortlessly with this no solder battery case featuring 21 cell capacity and builts in camping light for outdoor activity. The charging adapter box includes a digital display screen, removable spring basket design, and compactly design crafted from durability ABS plastic for reliable power management. Ideal for enthusiasts, camping lovers, and DIYers seek customizable portability power solution without welding tools or technical expertise. Perfect for emergency backup during camping trip, extended travel, or daily commutes to charge phones, tablets, and USB devices with its fast charging capability. Modulars design allows easy battery replacement and maintenance while ensuring safety with flat top 18650 compatibility for easy assembly. Specifications: Component:Plastic Color: Black, White, Green Size:Approx.178x80x65mm/7.01x3.15x2.56inch 6Option Type: Number of batteries: 21x18650 batteries Standard version: 10W/5V2A, Fast Charging Version: USB Output: 5V/3A 9V/2A 12V/1.5A 10V/2.25A(Support QC3.0/QC2.0/AFC) TYPE C output: 5V/3A 9V/2.2A 12V/1.67A 10V/2.25A TYPE C input: 5V/3A 9V/2A 12V/1.5A Purpose: Just Install the Battery into the Slot of the Sleeve and Correctly Connect the connectors of the Sleeve to Build a Complete powerbanks. Package Includes: 1pc powerbanks Case(18650 Battery not Included) note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.