Features: The 8 slot 21700 battery case DIY kit features a solder less design for effortlessly assembly and supports fast charging, enabling rapid power delivery for compatible devices. With clear polycarbonate shell, this power adapter box showcases internal components while providing overcharge, over discharge, and short circuits protections. For enthusiasts and first time builders, thi battery case not requires technical expertise to create customized power solution. Ideal for camping trip or emergency backup scenario, its lightweighted construction power smartphones, drones, and portable gadgets simultaneously via multiple USB C port. Expandable through series connection, this clear battery storage case combines industrial connectors with scratch resistant casing for durability, high capacity energy management. Specifications: Material: Plastic. Size: about 173x52x64.5mm/6.81x2.05x2.54in Weight: 180g. Color: orange, black. Output power: 22.5W. USB output: 5V/3A, 9V/2A, 12V/1.5A (multiple port output is only 5V); IN input : 5V/2A; Type C output: 5V/3A, 9V/2A, 12V/1.5A (only if it supports pd3.0 protocol, it will have output); Type C input: 5V/3A, 9V/2A, 12V/1.5A; Package Includes: 1PC 8 Slot 21700 battery box note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.