Product Features: 1. High-grade materials: This set of pen-shaped button batteries is made of high-grade materials, durable and practical. 2. Lightweight and compact: The kit has a lightweight and compact structure, which is very convenient to use. 3. Fine workmanship: The charger kit is finely crafted to ensure efficient and convenient charging. 4. Simple digital display structure: The charging kit has a simple structure and does not require complicated operations. 5. USB connection: The battery pole adopts USB connection, which is convenient and practical. Parameters: Name: Battery pole with TYPE-C interface at the bottom of the screen Color: Purple, Colorful Material: Zinc alloy, stainless steel. Battery capacity: 400mAh Preheating voltage: 3.7V Charging port: TYPE-C interface Product size: 89*14mm Single + paper box weight: 36.5g Tips: Please allow 1-3cm error of measurement. Photo color might be a little different from the actual product due to color display of different monitors. Product Includes: Welding Battery Pen*1 Charging cable*1