This is a new, sealed in original packaging, Spektrum (SPM) brand 210mah 1s 3.7v 50c LiPo; Jst Ph1.25mm Connector. Its part number is X2101S50
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov