Features: Experience efficient charging with TP4057 1A Lithiums Battery Charging Board, to quickly charge single 3.7V 4.2V Lithiums batteries with a stable output of 4.2V, ensuring safety and longevitys. Featuring modern Type C interfaces, this small charging board offer easy connectivitys and two directional insertion for enhanceds user convenience, for 5V 6V power adapters. for electronics enthusiasts and hobbyists, this charging module for those lookings to integrate battery into their projects. Whether you're working on homemades electric vehicles, robots, or portable devices, this Charging fit seamlessly into various applications, saving space while providing performances. With builts in overcharge, overcurrent, and short circuits protections, this charging board ensures a safe and dependable charging process, making it essential component in electronic toolkit. Specifications: Materials: Size:19.5x14x5mm/0.77x0.55x0.2inch Styles: 1PC, 3Pcs, 5Pcs(optional) Package Includes: 1/3/5Pcs TP4057 Charging Module note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!