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 ). Note: 1.Please turn off the power switch and unplug the battery connector after use 2.DO NOT Attempt to open ,disassemble the battery pack 3.DO NOT Crush,puncture,short external contacts or dispose of in the fire or water 4.DO NOT Expose to temperature above 60° (140°F) 5.DO NOT Overcharging and over-discharging 6.Never use or charge the bat.