The DS854085-3S Replacement Battery for Quad Copter RC Drone is a high-quality lithium-ion battery with a capacity of 2500mAh and a voltage of 11.1V. This battery, manufactured by ruko, is specifically designed for RC model vehicles and provides a long-lasting power source for extended flights. Its 3S configuration ensures optimal performance and reliability, making it a crucial component for enthusiasts looking to enhance their remote-controlled quadcopter experience.