Specificarion: Battery Volt：7.4V,Battery capacity: 1400mAh 15C,Please make sure yout RC Vehicle Battery are the same Voltage and same connector with the picture shows before you buy it. Plug Type: T Dean Connector.for WLtoys 4WD RC Cars A959-B A969-B A979-B K929-B. Function: As a spare battery for a your RC car or boat and can extend the playing time. High quality and safe to use,safe in normal use. Easy to plug in and out.Battery Size: 58*31*19mm ( L x W x H ).