Autel Robotics 237Wh Smart Flight Battery with Lithium-Ion Cells for Alpha Drones (Black, 2-Pack)The Autel Robotics Alpha Smart Flight Battery, with a rated capacity of 237Wh, has high energy density polymer lithium ion cells. Its cells, powered by laminated cell technology, which greatly reduces the internal resistance and improves the available capacity of the battery, provide an excellent battery life of 40 minutes. The battery is equipped with multiple security settings to ensure your device remains safe and protected. Its hot swap capability