The Turnigy Multistar high capacity 5200mAh 11.1V 3s Lipo Battery are brand new never been used, they're designed for use in a multi rotor or drone. Due to the low discharge rate when used in a multi rotor or similar vehicle your run time will be longer compared to other Batteries of similar size and weight. They could also be used in other applications were a high discharge rate isn't necessary such as a model boat to Increase run times. The full specs of the batteries can be found online Please use the photos as part of the description as no returns accepted. Feel free to ask any questions