This is a 11.1v 25c 4500 mAh Lippo Battery with female dean connector. This is basically used for Quad copter and RC planes. Capable of maximum continuous discharge rates up to 25C, placing this battery among the most powerful Li-Po battery packs in its class! It offer an excellent blend of weight, power and performance.This battery perfect for almost any application from indoor slow flyer to large-scale sport and aerobatic airplane models, as well as micro to mid-sized helicopter models. Specification: Capacity: 4500mAH Continuous Discharge Rate: 25C 35C Voltage Per Cell: 3.7V Max Voltage Per Cell: 4.2V Voltage Per Pack: 11.1V 3S Max Voltage Per Pack: 12.6V Suggest Charge Rate: 1C Features: Advanced battery technology Doubles your devices performance time. High capacity up to 200Wh/Kg energy density. Long cycle life (150 times minimum). Caution: Don’t over-charge, or over-discharge batteries. Don’t put it beside the high temperature condition. Don’t throw it into fire. Don’t throw it into water.