Features: [Longer Service Life]: With longer service life, you no need to worry about running out of battery in a short time when flying. [Easy to Install]: Easy to install and convenient to carry. [Environmentally friendly and Safe]: No matter it is used or discarded, it does not contain or produce any toxic and harmful heavy metal elements and substances. [Suits For]: 11.1V 2500mAh battery is suitable for the K3 GPS RC drone. [Warranty]: If there are any problems, please contact our store in time. We will give you a satisfactory solution. Thanks for your understanding.