Features: Experience the convenience of power with our power supply, a solderfree solution that empowers you to assemble a fast charge mobile charging for your devices. This features a robusts abs casing and requires four 18650 batteries to create a high capacity energy reserve, ensuring your gadgets stay charging with out the hassle of soldering. Perfect for diyer enthusiasts, traveler, outdoor sports aficionados, and anyone in need of power, this power supply caters to a diverses user base. Whether you're camping, hiking, or facing extended periods with out access to a power outlet, this power supply is your companions for all outdoor and emergencys charging situations. Stepups your charging game with this innovative power supply, designing for efficiency and ease of use, making it a must having accessory in today's mobile world. Specifications: Component:ABS Size:Approx.111x80mm/4.37x3.14inch Color:Black/White Only applicable to 1 8650 battery, 5th and 7th dry batteries are not applicable. The diameter of 18650 battery is 18mm. The length is 65mm, Voltages 3.7v- 4.2v The product do not contain batteries. Package Includes: 1pcs Power Supply note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. ②.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.