Feature:1. Wide Compatibility: Compatible with a range of models, including for Wltoys V912, V262, V333, V353, and BQ202 RC helicopter.2. Lightweight Design: The 7.4V 850mAh lithium battery is designed to be lightweight, making it easy to carry. It provides the perfect balance of weight, power, and performance.3. Durable Construction: The 7.4V 850mAh lithium battery shell is sturdy that allows for a long lifespan, providing reliable power for your RC helicopters.4. Extended Battery Life: The durable 7.4V 850mAh lipo battery provides a longer battery life, allowing for extended playtime and maximum enjoyment of the toy.5. Safety Features: The 7.4V 850mAh lithium battery is equipped with overcharging and short circuit prevention, ensuring safety during the charging process.Specification:Item Type: 7.4V 850mAh Lithium BatteryMaterial: Li PolymerWeight: Approx. 59g / 2.1ozBattery Capacity: 850mAh (Shipped with)Voltage: 7.4VSuitable: for Wltoys V912 V262 V333 V353 BQ202 RC Helicopter.Package List:1 x 7.4V 850mAh Lithium Battery