This is an E-flite 3S, 30C, 450mAh Li-Poly Battery Pack, with a JST connector. E-flite High-Power Series Lithium Polymer Batteries offer an excellent blend of weight, power and performance. Available in a wide variety of capacities and voltages, there’s a 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.
 
WARNING: Lithium Polymer (Li-Po) batteries come partially charged and are significantly more volatile than the alkaline, Ni-Cd or NiMH batteries used in RC applications. Keep batteries out of reach of children, unless supervised by a responsible adult. All interactions and warnings found on the sheet inside of this cad must be followed exactly. Mishandling of Li-Po batteries can result in a fire.
Before handling and first use, visually and physically inspect the battery pack, wire leads, and connectors to ensure there are no loose connections which may cause short circuit and eventual fire. By handling, charging or using this Li-Po battery you assume all risks associated with Li-Po batteries.