Specifications: -Battery Voltage:3.7V. -Battery capacity: 1800mAh. -Note:Please make sure yout RC Drone Battery are the same Voltage and same connector with the picture shows before you buy it. -Plug Type: JST Connector. -Battery Size: 57*29*10mm ( L x W x H ). -Weight:28.14g. Package Including: 2 x 3.7V 1800mAh 25C lipo battery 2x USB Charger.