Reaction 2 11.1V 3700mAh 3S 50C LiPo BatteryDetails: Fits most 1 8 and 1 10 scale vehicles Hard plastic case for increased durability and reliability Reaction 2. 0 Dynamite's new Reaction 2. 0 batteries come with all the power and performance you've come to expect from the original Reaction line, but now include a QR code directly on the battery label. You can scan the QR with the Dynamite Dashboard Smart Phone App for an even quicker and easier setup. In addition, all Reaction 2. 0 hard case