Warning tips: Discharge plug connector is female mini tamiya plug, square hole is positive polar, circle hole is negative polar, many many client do not attentioni this ,and found his device connector is not fit in the end. This battery does NOT work for 300E or 302E RC Car, their plug are different, choose battery ASIN B086R3CLXT instead for 300E or 302E RC Car. Package include 2 Pack 7.4V 1200mAh Lipo recharegable Battery with Mini tamiya plug and 2 Pack USB Charger Cable.Manufacture part number in Manual:PX9300-41, 7.4V 1200mAH 8.88Wh 2S Lipo Battery,