3.7V 3000mAh 11.1Wh Li Battery 505573 JST 2Pin 1.0/1.25/1.5/2.0/2.54mm Connector
2pin 1.5 and 2pin 1.5 F : the order of red wire and black wire is diferent. 2Pin 1.5 : 1th pin is black wires. 2th pin is red wires. 2pin 1.5 F : 1th pin is red wires. 2th pin is black wires. = Capacity : DC3.7v 3000mAh 11.1Wh.