Features: Easy assembly and maintenance: Solderless designing allows users to assemble and disassemble easily for battery replacement or maintenance. High capacity and long time use； It can hold 8 18650 batteries, which greatly enhances the power supply energy storage capacity and can meet the needs of long-time use, which is perfect for outdoor activity or emergency use. Fast Charging Function Supports fast charging technology, which can fully charge the device in a short period of time, improving the charging efficiency and saving users' time. Strong compatibility Suitable for a wide ranging of devices, such as mobile phones, tablets, digital cameras, etc., providing broad compatibility and charging solution. Safe Protections Design Equipped with overcharge, overdischarge, and short-circuit protections functions to ensure safety during charging and extend battery life Specifications: Size:about 172x80x23mm/6.77x3.15x0.9in Removable and solderless: for 8pcs 18650 Batteries Holder (Batteries not included ) Disassembly: output/input power: 5V-2.10A With anti-reverse connection protections Color: Black /White Package Includes: 1PC For 18650 Holder Box note: Due to the problemsof lighting effects, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement