【High Capacity and Performance】: This 3.7v lithium ion battery offers a nominal capacity of up to 1800mAh, ensuring long-lasting power for your devices. It maintains a steady operating voltage, providing reliable performance. 【Energy-Efficient and Long Life】: Designed with energy-saving features, this battery has a long cycle life. It also has a low self-discharge rate, retaining its charge over extended periods. 【Safe and Durable】: Built with advanced lithium-ion technology, this battery features built-in protection against overcharging, over-discharging, and short circuits. The durable casing ensures safety and longevity, making it a dependable choice for everyday use. 【Type of Plug】:XH 2.54-2P connector. The red wire is the positive pole "+", the black wire is the negative pole "-". 【Versatile Applications】:Suitable for a wide range of applications, including flashlights, LED flashlights, laptops, drones, and more.