This replacement Li-ion battery, model A1875, is specifically designed for the Apple Watch Series 3 42mm GPS version. It features a voltage of 3.82V and a capacity of 342mAh, providing a total energy of 1.305Whr. The battery is presented in a compact, black rectangular form factor, equipped with a flexible connector for installation. It serves as a direct replacement component, ensuring compatibility and functionality for the specified Apple Watch model.