• 3.7V 1S rechargeable replacement Lithium polymer battery 250mAh for RC Helicoptyers and Quadcopters 
• Connector Type: 2-Pin jst Pitch 1.25mm; Cable Length: 1.4 inch,
  
• Before replacing, please compare with the old battery and check for the correct polarity of the battery. Red wire connection power positive " +" , Black wire connect power negative pole "-". if is a reversed, you need position of interchange wires.

Size: 24.72mm x 16.83mm x 7.44mm with no connectors